Why is it that heterosexual males have such an interest in penises?

[Aielyn]

Mr Puggsly said:

theprof00 said:
Fetish should not be confused with gay. There's a clear difference, and I think you're being very disrespectful to categorize gay people in such a way.

But the fetish is gay. Fundimentally we're talking about a man turned on by male genitalia.

What if they're turned on by the idea of being a chick with a dick, etc? You know, the whole "I can play with my own boobs" angle?