Yes, I've seen some boys on too. Even if the majority of boys don't have tamagotchis it shouldn't really matter. But this really isn't the forum for it. This is the "What Happened To My Tamagotchi?!" forum.
Great answers guys. By the way I didn't know which board it was because there is no general tamagotchi questions forum, and I'm not a "new tamagotchi owner". Which board should I have posted in?
Tamagotchis are probably starting to appeal more to girls because BanDai seems to make a lot of girly designs for them, i.e. the shells (Makeup fun? Yuck!) and even the backgrounds (I don't think guys are into hearts that much...). I'm a girl, but I can't stand girly designs like diamonds and lipstick and all that. I'm thinking of e-mailing BanDai about this...