In some countries they removed the fanservice and marketed it as a shonen show.
They still left all the cases of child abuse by the villains though.
Even though it's a Magical Girl series it's very heavy on the sci-fi and seems more like a Gundam series. Later installments take away the Magical Girl elements making it much more obviously aimed at men.
Strike Witches might seem to be for girls judging from the cast, but any of the promotional art should make it clear, from the skimpy outfits and aerial combat, that it is filled with Fanservice all the way through.
When you first hear that Kiss Players is about Transformers powering up by getting a kiss from a human girl, you might think that the series is aimed at young girls. But then when you see the blatant, unrelenting sexual imagery, you think different.
A Little Snow Fairy Sugar is an extremely cutesy show about a young girl who hangs out with cute little fairies who create the weather. It aired at Otaku O'Clock and the manga adaptation was shonen. This is a very odd example, noting that the show itself is very G-rated.
In fact, majority of "cute girls doing cute things" shows are targeted towards the seinen demographic. Case in point: Gochuumon wa Usagi desu ka?, Kin-iro Mosaic, A Channel, Manga/Kanamemo, Manga/Yuyushiki, and Manga/Hanayamata are all serialized in the same magazine (Manga Time Kirara).
Girl Friends focuses a lot on fashion, cosmetics, and other typically girly things, giving people the impression that it's a Shoujo manga. Even the fact that it's a Girls Love series doesn't prevent this, since Girls Love is popular amongst females too so people just assume that it's meant for a LGBT conscious young adult audience considering how realistically it handles the issues of a budding sexuality. Thus, people tend to be surprised when they discover that it ran in Comic High, a Seinen magazine.
A common stereotype of Axis Powers Hetalia fandom is that it's seemingly made up entirely of yaoi fangirls. On the other hand, it's listed as a Seinen series and has both male and female fans.
Subverted with the Pretty Cure Franchise. It actually IS a franchise meant for little girls...yet at the same time, official marketing papers have 16-40 year old men as a main demographic at the same time. This explains that compared to most other Magical Girl shows (And even other Magical Girl Warrior shows) why it tends to have physical punching and kicking in it's fight scenes on a level that would make most Fighting Series blush with jealousy.
Barbara Slate's Angel Love comic book series of the 1980s, having rather cute cartoonish artwork, yet dealing with serious topics such as drug abuse, abortion, critical illnesses, and incest.
There's a video of a five-year-old girl singing the "voulez-vous coucher avec moi ce soir?" line from Labelle's "Lady Marmalade." Presumably the train of thought was "It's about dancing, right? Girls love dancing!" Too bad it's not about dancing, it's about a prostitute, and the line translates to "do you want to sleep with me tonight?"
The Spice Girls. It's hard to tell exactly how much of their "Girl Power" theme was serious, and how much was self-parody, but it their lyrics make it clear that it was at least about sexual liberation... to the dismay of the parents of the 8 year olds who would parrot the lyrics.
TheIdolmaster. A cute game about pop stars! With catchy songs, cute dresses and tons of accessories to dress up. But the target audience is otaku, with overpriced DLC no young girl (or most adults) can afford. Worth noting though is that Bandai-Namco is trying to get more girls to play the games, by adding male characters. But the original demographic complained!
The new spinoff game iDOLM@STER Side M is targeted at girls... Teenage girls and young women, though, not little girls.
Harvest Moon was aimed at a gender-neutral audience originally but you wouldn't know it by its mainly female fandom. The first few games had male-only protagonists but eventually they added girls, either in a Game-Favored Gender manner or in their own Distaff Counterpart's. Modern games always have an option to chose your gender. Recent incarnations of the game have began to look a lot more Bishoujo than before.
You'd be surprised at how many clueless parents get Neptunia games for their young daughters. You'd think the Cleavage Windows front and center and T (M in the case of mk2) rating would be enough...
minus is a brightly-colored cute-looking webcomic about an omnipotent little girl, albeit with a ton of Fridge Horror, but if TV Tropes is anything to go by, most of the people who read the comic are men.
McCracken's college assignment that spawned the series, Whoopass Stew (the title alone should make it clear which demographic he wasn't shooting for), went as follows. Girls beat the crap out of the Gangreen Gang. Amoeba Boys rob a bank. Girls try to stop them but get stuck in their bodies. Girls prevail by flying to the sun, which kills the Amoeba Boys in seconds.
Speaking of Magical Girl, by sheer irony, Toei Animation (the creators of Sailor Moon) remade the series as "Powerpuff Girls Z", an actual retelling of the series with a magical girl theme.
The Bratz dolls are more kid friendly, the TV show is definitely intended for their original target audience, teens and preteens. Among other things, the show actually has an episode where the girls investigate to see if Burdine murdered her last intern.
Making Fiends is actually a relatively dark cartoon about attempting murder with demons, and the colors are anything but bright, pastel or pink. But the two main characters are young girls. The original web animation was for a neutral demographic, but the daughter of a Nickelodeon producer loved it, and so Nick made a deal with Amy Winfrey to turn it into a cartoon. If you look at any of the message boards for Making Fiends, you'll see that male fans are extremely rare, though the show has gotten positive reviews from many male critics.
Considering Nickelodeon only aired six episodes of the show back in 2008, it could just be that people in general, male and female, haven't had a chance to see it.