I don't really watch animé anymore, or any cartoons for the matter. Now I'm into more real-life stuff, like law-enforcment, auctions, & things like that. Thus, I think the reason why I'm having trouble remembering that animé in particular is that it was literally over a decade ago was when I watched it. That's like shooting for the moon, here!
Regardless, that show made me think that whenever someone falls in love, literally all of their brain functions cease, & thus their second head is like, "All right! This body is mine for the taking!!"
Yes, girls have a second head, too, though it's not so much a head that's in between their legs. It's more like, their head above their pelvis, more or less.