Oh, sssssssssssssssstoppit.
I've read in multiple places that many straight men have had sexual experiences with their straight buddies. I know for a fact that this is at least partially true. I also know that some straight men will have sex with their gay friends, from personal experience.
What is interesting about this phenomenon is that it doesn't mean that these guys are gay, or even that they are necessarily attracted to men...but that it is a social thing.
Are men just naturally perverts who will do whatever it takes to get off? GOD, I hope so.