It's just animalistic nature. Humans are animals, even if you try to deny it. And animals will have sex with animals, even if they're not of breeding age. Why do humans hide their natural desires and behaviors? Why do we get shy when we take a shit? It's no different.
I just got a warning, saying that my twitter account has "broken the following rules," followed by no rules being listed. Guess I'll keep doing what I do best, then~