'''Original air date''': March 26, 2006

After a pregnancy scare, Lois urges Peter to get a vasectomy so they can't have more children--after telling his friends about it at the Drunken Clam and brings up the possibility of him and Lois wanting to have another baby, the guys suggest that Peter should freeze some of his sperm at the local sperm bank beforehand. After Peter goes through the vasectomy, it kills his sex drive and drives Lois to stuff herself with food.

Meanwhile, Bertram (the sperm cell who fought with Stewie in "Emission Impossible") is born (from a lesbian couple who bought Peter's sperm at the sperm bank) and wages war with Stewie.

NOTE: This was the last "Family Guy" to air on Creator/{{TBS}} before Creator/WarnerMedia let its license expire. After that point, "Family Guy" would air on Disney-owned networks Creator/{{Freeform}} and [[Creator/FXNetworks FXX]].

!!Tropes used in the episode:
* AllLesbiansWantKids: The Gym Teacher and her partner go to the sperm bank to help conceive their child. 9 months later, their son Bertram is born.
* ArtisticLicenceBiology: Bertram is born looking exactly the way he did in "Emission Impossible", even though the father's sperm only contributes half of a child's genes.
* ArtisticLicenceHistory: On the JFK assassination.
--> '''Lee Harvey Oswald''': Hey, Mr. President! Mr. President, up here! I voted for you. Wait a minute. That guy on the grassy knoll's got a gun. He's gonna shoot the President! Holy smokes, I've got to do something! (grabs a gun and aims it out the window) All right, Lee, time to become an American hero.
* BaitAndSwitch: At the end it sounds like Lois is going to talk to Chris about the dangers of overeating, but she talks about it to Meg. When she talks to the actually obese Chris, all she does is compliment his hat.
-->'''Meg''': For your information, Mom, I don't eat to solve my problems. ''[[SelfHarm I cut myself]]''. [[SarcasmMode Is that better]]?
* BalloonBelly: Lois gains a lot of weight in this episode.
* BigBeautifulWoman: Played with. At first, Peter finds himself hypocritically repulsed by Lois's weight gain until they accidentally have sex. His opinion immediately changes and he starts affectionately calling her things like "concubine" while keeping her fat.
* BigEater: Lois becomes one when Peter refuses to have sex with her.
* ButchLesbian: The Gym Teacher and her partner are quite butch in appearance and mannerisms compared to the other women in the episode.
* ChubbyChaser: Peter's newfound attraction to Lois post-weight gain jump-starts their sex life.
-->'''Peter:''' Fat sex is the hottest sex we've ever had! There were so many boobs I couldn't tell whose boobs I was grabbin', your boobs or my boobs!
* DoubleStandard: When Peter keeps criticizing Lois for her weight gain:
--> '''Lois''': You're one to talk. Look how fat ''you'' are!\\
'''Peter''': Lois, men aren't fat. Only fat ''women'' are fat.
* FatAndProud: After their first night of "fat sex", Lois comes to embrace her morbid obesity, not really minding it anymore.
* TheFatEpisode: Peter loses his sex drive after a vasectomy and Lois turns to overeating because he can't satisfy her. Peter then discovers he has an obesity kink and encourages Lois to gorge herself in order to revive their sex life. At the end of the episode, she has a heart attack and is rushed to the hospital for emergency liposuction, restoring her to her original size.
* {{Gasshole}}: After Lois has gained weight, Peter remarks she has farting problems.
-->'''Peter:''' Last night, you farted, and it felt like someone was sticking me with a cigarette lighter from the car!
* GroinAttack: Stewie gives one of these to a bully who wouldn't let him on the jungle gym.
* HypocriticalHumor: When Peter is apprehensive about getting a vasectomy, Joe tells him that a bunch of guys on the force got vasectomies and their lives haven't changed at all. However, he immediately and violently shoots them down when asked if he would get one.
* IntentionalWeightGain: After finally getting over Peter's reluctance to have sex, Lois allows him to fatten her up further for hotter sex.
* KickTheDog: Peter to Lois during their dinner date as he continually makes rude comments about her weight, then pushes two completely different tables aside as if he were to be ordering the construction crew to "bring her in". On top of that, he rebuffs her calling him out on his weight and this infuriates her more, causing her to eat out of spite to teach him a lesson.
--> '''Peter''': Now, if you'll excuse me, I got to go warn the chef that you arrived!\\
'''Lois''': (starts immediately overindulging in bread at the table) He wants "fat"? I'll give him fat! The only reason I'm eating so much is because of ''him''! He won't touch me!
* KinkyRolePlaying: Parodied in a cutaway when Lois blames a PregnancyScare on when she and Peter tried role-playing:
--->'''Lois:''' ''[dressed in [[CatholicSchoolgirlsRule a schoolgirl's uniform]]]'' Oh, I need a spankin'. I'm a bad, bad girl.
--->'''Peter:''' I'm a paladin with 18 charisma and 97 hit points. I can use my helm of disintegration and do one D4 damage as my half-elf mage wields his +5 holy avenger.
--->'''Lois:''' Paladins can't use the helm of disintegration.
--->'''Peter:''' Oh. Okay, then I'm a Black guy.
* LongList: Peter rattles off all the kids they have (except Meg), and a bunch that aren't.
--> '''Peter''': We can't afford another kid. We already got Chris, Stewie, [[Series/HappyDays Richie, Joanie]], [[Series/TheBradyBunch Greg, Marcia, Bobby, Jan]], [[Series/GrowingPains Mike Seaver, Carol Seaver, Boner]], [[Series/FamilyMatters Urkel]], [[Series/ThreesCompany Mr. Furley]].\\
'''Brian''': Peter, those aren't your kids. That's the Nick At Nite lineup.\\
'''Peter''': [[VideoGame/StreetFighterII Blanka, Zangief, Chun-Li, Guile, E. Honda]].\\
'''Brian''': That's ''Franchise/StreetFighter''.\\
'''Peter''': Red, blue, green.\\
'''Brian''': Those are ''colors''.
* MediumBlending: The ''WesternAnimation/IceAge'' cutaway. Everything is rendered in the CGI style of the movies, except for Peter, who is drawn in the show's usual 2D style.
* NotWhatItLooksLike: Subverted with the ending; when Peter is revealed to be in a closet making out with Lois's liposuctioned fat, he pauses for a minute, but when he can't think of an excuse, he says, "It's ''exactly'' what it looks like."
* OverlyLongGag: The vaudeville singers' [[ButIDigress off-topic lyrics]] during the vasectomy song:
--> '''Singers''': ''(singing)'' You'll never have to wear a condom, when you do it with your wiiiiiife! ''(talking in harmony)'' Or anyone else you wanna do it with, we promise not to tell, like that new hot chick at work. You know, the one who always has high beams under her ribbed white cotton T-shirt, but then stares dagger sat you for checking her out. And it's like, why do you wear that if you don't want attention? But you know you shouldn't think that way because of the sexual harassment meeting you all had to go to. Seriously, how lame was that? And you couldn't help but notice that the female lawyer running the seminar had a huge rack. Like, ridiculously huge for someone who has to talk about that kind of stuff. Well, I guess that's the definition of the word ironeeeeee! ''(resumes singing)''
* ParentalNeglect: Lois doesn't tell her overweight son Chris the dangers of overeating. Instead she tells the normal weight Meg to the dangers of overeating. Meg fires back that she doesn't eat to solve her problems, she cuts herself instead. Unlike most concerned parents, Lois ignores Meg's self-harm boast and compliments Chris' new hat instead.
* PrisonRape: While in prison, Peter was forced to strip down to his underwear and put on an erotic show for the other inmates.
* ProductPlacement: The cutaway of Peter meeting [[WesternAnimation/IceAge Scrat]] was made to promote ''WesternAnimation/IceAgeTheMeltdown'', which was released in theaters five days after this episode aired.
* ShoutOut:
** Stewie asks a kid on the playground, "You! [[Film/TheBluesBrothers You got my cheese whiz, boy?"]]
** Bertram says, [[Film/ANewHope "I sense something. A presence I've not felt since..."]]
* SuspiciouslySpecificDenial: At the sperm clinic, Peter accidentally knocked over a bunch of sperm vials, and when exiting the freezer later:
-->'''Peter''': (to nurse) And, uh, just so you know, everything in there is exactly the way it was when I went in. There is absolutely zero chance that I spilled all the jars and had to refill them with my own sperm. ''Zero'' chance.
* TakeThat: To the comic strip ComicStrip/{{BC}}. There's a cutaway to an example of a strip that's a long setup to a lame pun, which has Stewie pop up on screen to laugh sardonically.
* TemporaryBulkChange: Lois becomes about as fat as Peter in this episode.
* ToiletHumour: A cutaway involves Peter trying adult diapers.
* TheUnintelligible: Creator/TonyDanza and Creator/SylvesterStallone in ''What?''.
* TookALevelInJerkass: Bertram. After his and Stewie's parting on good terms in his previous appearance, they're fighting again in this episode.
* TruthInTelevision: A vasectomy is actually much safer and quicker than a tubal ligation (the female equivalent)--a vasectomy is also generally a lot cheaper.
* VerbalBackpedaling: We get this exchange between Lois and a waiter at the restaurant.
-->'''Lois''': Do you think I'm fat?\\
'''Waiter''': Only if you think I'm a serial killer.\\
'''Lois''': ''What?''\\
'''Waiter''': Nothing.
* VictoryIsBoring: In this episode, Stewie finally gets to live out one of his dreams to rule over a piece of territory, in this case, a playground. However, after having his rule be uncontested for a while, Stewie began to get bored of ruling with no one to usurp him, but his attitude quickly changes when he realizes he'll have to defend his reign and territory when Bertram shows up.
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