So for those of you that aren't too 'in' on the whole Reddit thing, /r/TotallyStraight is where people go who identify as straight but have an interest (or in some cases, addictions to) gay porn. The subreddit is pretty clear that the community isn't supposed to be helping guys get over their issue or actively promote it: it's just a bunch of 'straight' guys that want to enjoy the delights of male on male action.
As a gay guy, it's kind of hard for me to relate. I mean, I've never looked at a straight porn flick and thought to myself "damn, that's pretty good - tits are awesome!". Still, I guess if you're on the cusp, just questioning about your sexuality or are fully straight and looking for porn that might be relevant to your interests, what's available here on /r/TotallyStraight is pretty much the ideal collection.
There are currently 20,000 readers, which suggests to me that there are quite a few straight bros out there that are in the closet and really hoping to fuck a butt some day. To those: I say good luck, and enjoy. ;)