"You see, it's because of her mean older brothers that she is immune to all manners of toilet nastiness. It's really sort of a gift, like playing the violin. Or dancing. Or playing the violin and dancing while Isabella's brothers fart at you."The tendency of female characters displaying skills in something that is traditionally viewed as being more of a male thing to explain it as being the result of having a number of (usually older) brothers. Occasionally there is gender reversal (that could be viewed as being equally sexist) with a male character explaining his ability in stereotypically feminine areas such as cooking as being the result of having sisters.
— Jamie Kelly, Dear Dumb Diary #8, "It's Not My Fault I Know Everything"
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- In one car commercial, this trope is shown in the way to sympathize with someone—a father sees his daughter feeling left out of her brothers' activities, and he cheers her up by explaining how he had grown up being outnumbered by four sisters.
Anime and Manga
- Extreme variation in the second sound stage of Magical Girl Lyrical Nanoha StrikerS while Alto and Lucino discuss their families:
- Touma Minami is the resident Bifauxnen and Ore Onna in Minami-ke. Guess how many Aloof Big Brothers it took to make her thus?
- Hikaru Shidou from Magic Knight Rayearth has three older brothers, who work at their dad's kendo dojo. She's really good with a sword, and it also explains why she uses the masculine pronoun "boku".
- This trope and its genderflipped version form the plot of the short manga You're My Girlfriend: The female lead grew up surrounded by older brothers, whereas the male lead was more-or-less groomed by his older sisters.
- Gender-flipped in Mobile Suit Gundam Wing, where Quatre's family consists of his father and twenty-nine sisters, possibly explaining his gentle nature. Of course, if you lived with 29 women, you'd learn to put the seat down real quick, too.
- In Digimon Xros Wars, Akari says that she's always playing shooting games with her brother, to explain how she managed to destroy a fleet of living aircraft carriers with missiles from a boarded craft.
- Otomen: Juta Tachibana has ten little sisters and is an author writing under a penname to support them.
- Bokura no Hentai:
- Inverted with Wholesome Crossdresser Satoshi. He has several older sisters and borrows their clothes. Even after he stops crossdressing due to hitting puberty he is still In Touch with His Feminine Side and quite flamboyant.
- Hacchi was a tomboy in elementary because she had brothers. She eventually underwent a Girliness Upgrade after her male friends stopped playing with her.
- An inversion is subverted in Kimi to Boku. Chizuru thought Shun was feminine because he came from an all-girl family however Shun has two sisters and a younger brother.
- Scarlet, in the G.I. Joe comic books, learned to be so good at martial arts because of her five older brothers, who were all instructors at her father's karate school.
Films — Animated
- Atlantis: The Lost Empire: Averted but alluded to where the young Wrench Wench, Audrey, mentions that her dad didn't have any sons (just her and her older sister). Audrey's dad needed someone to follow in his footsteps as a mechanic, so Audrey was the one who chose to become a mechanic. Her sister, on the other hand, ended up taking up a career in boxing—Audrey had mentioned that her dad was also really into boxing, and he wanted one of his daughters to take up something related to that.
Films — Live-Action
- In My Cousin Vinny, this was how Vinny's fiancé, Lisa (who works as a hairstylist), knew virtually everything there is to know about anything related to cars. Lisa explains that her family runs an auto repair business, and that her dad, her uncles and her brothers all worked as mechanics—before becoming a hairstylist, Lisa herself worked as a mechanic to help out with her family's business.
- The reason Natalie in the Charlie's Angels movie is so tough is because she has five older brothers who are in law enforcement/special forces/the FBI/etc.
- In the film Race to Witch Mountain, the female alien expert beats up a soldier and then offers this explanation.
- In the Police Academy movies, Tackleberry's new girlfriend is as tough as he is, because her brother and father 'joke around' by hitting each other as hard as they can.
- Van Wilder: "My brothers play hockey. For the Rangers."
- This is why Vivian from Pretty Woman knows so much about cars.
- Harry Potter:
- Played with in one case where Ginny's Quidditch skills are related to her six Quidditch-obsessed older brothers—because they never let her play with them. This resulted in her sneaking out with their brooms and secretly practicing on her own. Her brothers were very surprised.
- In the final book, Harry also notes that having six older brothers probably explains Ginny's toughness.
- In Lois McMaster Bujold's Barrayar this is how Droushnakovi acquired the skill and ambition to become (apparently) the only female bodyguard on the planet.
- Deliberately subverted in A Song of Ice and Fire. Sansa and Arya both have two older brothers and two younger brothers, but while Arya goes the tomboy route, Sansa is hopeless at anything she doesn't think of as "ladylike". Arya's fire is because she's supposed to take after her father (or, more accurately, her late aunt) than Sansa, who greatly resembles her mother. There's also Brienne of Tarth, where it's also subverted because every one of her prospective older brothers died relatively soon into their lives. Brienne herself was unable to keep out of fights, so her father decided he should teach her to fight so that she wouldn't get hurt all the time. The result is a strong, skilled fighter that can defeat one of the best knights (If not in his area of expertise) in the Seven Kingdoms in an even fight.
- In Terry Pratchett's
- Equal Rites - "It was true that the girl spent more time climbing trees and running around shouting than little girls normally did, but a girl with four older brothers still at home can be excused a lot of things."
- Slight variation in Monstrous Regiment, where Polly gets her ability to imitate boys from her family's owning a pub.
- Not a skill, but Juliet in Unseen Academicals dismisses Glenda's dismay that she knows what tonkers look like by reminding her friend that she's seen her brothers bathing.
- In Provost's Dog, Beka's friend Ersken once comments that a man flirting with Beka is good looking. Paraphrased - "Don't look at me, Beka. Well, do look at me, but not like that. I have four sisters. If I didn't know what made mots(girls) curl their toes, I'd have to have had my head in the river for seventeen years."
- In Meg Cabot's The Mediator series, Jesse helps Suze bandage her blisters from new shoes (the walking home on asphalt in a California heat wave probably didn't help either). When she askes how he knows what to do, his response is (paraphrased): "I grew up with three sisters. I know a thing or two about new shoes."
- Subverted in the H. Beam Piper novel Lord Kalvan of Otherwhen with Princess Rylla: blonde, beautiful, and a hard-riding cavalry officer who loads her pistols with a heavier-than-usual charge.
"The gods," Chartiphon explained, "did not give our Prince a son ... so our little Rylla must be as a son to her father."
- Parodied (and taken Up to Eleven) in the Dear Dumb Diary books. "She has brothers"—specifically "mean older brothers"—is basically Jamie's excuse for why her best friend is an Ax-Crazy Manipulative Bastard. In over a dozen books, the actual evidence presented in this direction is: 1) Said brothers may have once lined up and farted in Jamie's direction, and 2) one brother has a room so filthy and personal habits so unhygienic that the sight demands Brain Bleach in multiple females. The evidence that Isabella is a pure sociopath is much greater, and continual.
- Subverted in the Mercy Thompson series, in that Mercy attributes her assertiveness (and how!) to the fact that she grew up with werewolves, not the fact that most of them were male. Also, her skills as an auto mechanic come from being trained by a fae later in her youth, not from a childhood among males.
- The Animorphs series gives us Estrid, an Andalite theoretical physicist who happens to be very, very good at tail-fighting, because she learned from her brother - a renowned exhibition fighter. Unusual in that her gender isn't the (main) reason for Ax's surprise, her lack of combat experience (and the sheer skill she exhibits) is.
- Life with Boys: The female protagonist is a teenage girl living with three brothers, her father and no female role figure (except when her paternal grandmother visits). She's even on the wrestling team.
- The titular heroine of Elizabeth Peters' Vicky Bliss series of mysteries has two (or possibly three) older brothers, and is the only girl in the family. She frequently uses this to explain away her disinterest in "feminine" clothes and values, and her ability to hold her own in an unarmed fight, though the fact that she and said brothers grew up on a working farm is at least as significant in this regard.
- In Georgette Heyer's Arabella, the hero notices the heroine using boxing cant and thinks to himself, "So, the little Tallant had brothers." (She's been trying to make him believe she's an heiress.)
- Journey to Chaos: Nolien explains that his ability to give fashionable haircuts comes from his younger sister. She found it more convenient to burst into his room than make an appointment at a salon.
Live Action Television
- Daphne Moon on Frasier: "You don't grow up with eight brothers and not learn a thing or two about engines. Or the importance of being first in the shower."
- Drake & Josh: It's in the aptly named "Girl Power." Drake's "Date of the Week," a girl named Lucy, briefly fights off some bullying jocks by throwing one of them into a table. When Josh questions where Lucy learned to fight like that, Lucy replies with, "I grew up with five older brothers. It was either learn how to fight or get held down and burped on."
- Parodied on Little Britain, where Emily Howard (a lady!) is walking past and a man, seeing as it's incredibly obvious that Emily's a man, calls "her" over to ask if "she" can fix his van. Emily insists she can't fix it as it's not a very lady-ish thing to do, but she eventually caves in and explains what's wrong in great detail, fixing it entirely. Her justification? "Growing up with four brothers, I was always going to be a bit of a tomboy!"
- Played somewhat straight, but with an added dimension, on Eureka: kick-ass ex-Army Ranger Deputy Jo Lupo is all about such "manly" things as guns and beating people up (and only reads girly magazines when she thinks no one's looking). They didn't trot out the brothers excuse until the second season episode "Noche de Suenos," when she confessed that she used to want to be a dancer, but growing up with no mother and three brothers, she had to "learn to survive" and gave up on the dancing thing.
- A one-off character on House, interviewing for an open position on House's team, explains why she hasn't stormed out offended: "I have four brothers. Keep your hands to yourself, and I can take anything that comes out of your mouth."
- In the Law & Order episode "Girlfriends," Rey Curtis recognizes an item of lingerie as "the same label Madonna wears," explaining that he "lives with four women."
- One of Echo's imprints in Dollhouse who was not intended for combat showed off gun skills and explained them by saying she had "four brothers." (cocks guns) "None of them Democrats."
- Full House: Becky takes over for Jesse announcing a charity hockey game. Noticing Jesse's surprise that she knows what she's doing (which he certainly didn't), she mentions growing up with "5 hockey-crazed brothers."
- Jo from The Facts of Life is a major aversion. She's the resident Lad-ette auto mechanic who grew up an only child with a single mother.
- In Kyle XY, Josh first runs into Andy when she's hiding in the boys' restroom playing online games (the boys' restroom has better Wi-Fi reception than the girls', apparently). When Josh freaks out about a girl being in the boys' restroom, she replies "Oh, relax. I have brothers."
- Played with in Brooklyn Nine-Nine. In the first episode, it's explained that Amy Santiago grew up with seven brothers, explaining her hyper-competitive, perfectionist streak. On the other hand, Badass Biker Rosa Diaz pointedly does not have a backstory explaining how tough she is - she's just naturally hardcore.
- NCIS. Rookie agent Ellie Bishop easily disarms and subdues a guy twice her size, surprising the team, who were rushing to rescue her. She shrugs off their astonishment. "I have three older brothers."
- Team Fortress 2 has a rare same-gender sibling example. The Scout gained his speed from being the youngest of eight brothers: He had to train himself to run fast because it was the only way he could get to a fight before the others beat everybody up first!
- According to Resident Evil: The Darkside Chronicles, Claire Redfield's brother did give her some basic training.
- In Tokimeki Memorial 4, Itsuki Maeda lives within a family made only of men (father and brothers), who are all mechanics. As such, she has skills and hobbies percieved as masculine such as playing soccer, and being able to fiddle motorbikes and cars. That doesn't prevent her for having a cute feminine side, though.
- The manual for Final Fantasy XII explains that Penelo's martial prowess comes from training from her elder brothers who served in the Dalmascan military.
- Kim Wu in the reboot of Killer Instinct has two older brothers, which probably helps explain her spunky attitude and willingness to brawl with monsters, aliens, and the like.
- Breya from Schlock Mercenary uses this to justify beating her black-belt martial arts instructor. Kevyn then uses "I'm one of her brothers." to justify doing exactly the same thing.
- Nay's more nerdy habits in Khaos Komix are explained with this.
- Silvia from Gold Coin Comics has two older brothers, and she tries to be like them by studying Time Magic.
- Shelly of Wapsi Square had seven older brothers, and her mother died when she was around ten, so she was the only female around for much of her childhood. At present she is really tough, and worked as a mechanic for a while before she switched to being a personal trainer and kickboxing instructor.
- Manly Guys Doing Manly Things uses the "I have sisters" variant of this trope to explain Ganondorf's elaborate hair designs. A reference to the fact that he's The One Guy in the otherwise female Gerudo race in several of the games.
- Played with in this Girl Genius strip. Violetta does display surprising knowledge in a field that she's expected to be ignorant of, and justifies it by pointing out "I spent practically my whole life with [male cousin] Tarvek!" The thing is, the field is high fashion — Tarvek has been well-demonstrated to be The Fashionista.
- A non-sibling variant in Foster's Home for Imaginary Friends: Mac and Frankie have called in to a radio show to win tickets to a new movie, but first they have to guess what romantic comedy the lead actor starred in. Mac immediately says, "Daffodil Days!" In response to Frankie's confused stare, he says his mom likes it.
- Male version: On Camp Lazlo, Raj plans Lumpus and Jane's wedding because "I have 17 older sisters. I think I know a thing or two about weddings."
- Lor from The Weekenders has at least a dozen brothers (she's not sure exactly how many) and no sisters. She's enthusiastic about sports and very athletic.
- Also Louie's mother's ability at baseball in Life With Louie.
- On Gravity Falls, Wendy's tomboyish nature probably comes from having three younger brothers, no visible mother and Manly Dan for a father.
- Played with in The Loud House: Lincoln Loud, the lead character, is the middle child and only son of eleven kids, and while he does have typical boyish interests like comic books and video games, most of the "feminine" things that he knows about are related to things that his sisters are interested in (such as Lola's interest in beauty pageants leading Lincoln to know which types of fabric are harder to clean than others), are practical (such as being able to cook) and learning to be kind and sensitive (as shown in "One of the Boys"). However, as shown in "Lincoln Loud: Girl Guru," just because Lincoln has a bunch of sisters, it doesn't automatically make him a "girl expert."
- Studies of the behavioral effects of sex hormones have shown that female rats born to otherwise all-male litters tend to exhibit masculine behaviors, such as urine-marking and mounting to display dominance. Androgens from their numerous male siblings appear to have seeped over within the uterus, influencing the female pups' brain development.
- Murasaki Shikibu (author of The Tale of Genji) learned how to write kanji (back then, men wrote in kanji while women were restricted to hiragana) by observing her brother's lessons.
- Actress Kate Beckingsale of Underworld fame grew up with four older step brothers she was close to, which likely led to her tendency to play Action Girl characters. According to a few interviews, years of getting wedgies from them has made her react fast.