I don't think gay guys are more likely to have bigger cocks (or guys with bigger cocks are more likely to be gay) I just think that a site where you check out other guys cocks is likely to attract alot of gay and bi users.

I'm straight, I've never been with a guy.
I only put '10% gay' because sometimes I feel a little bit curious.
I'll always be way more straight than gay though, I love pussy too much! lol