Eh, some people let their desires run wild, especially when it comes to what you can't have.
Desire can be really strong and intensify something that really isn't that great, but because you don't or cant have it you want it even more than other things. This is often the scenario with gay guys and is frequently sean (
![eli's_rhythm](http://img.photobucket.com/albums/v232/korn0818/ATRL_Smilies_All/atrlers/eli_zps0932edf9.gif)
) and tapped into in the "movies" that gays are into.
Its in the psychology of love and sex, we desire things hard to achieve, therefor want what we cant have...and cant have what we ultimately want.
Edit: Im just saying it isn't all that weird for a lot of gays to be "Str8 chasers". Its to be expected and its something that just isn't talked about that much.