/r/ManGoneWild is a subreddit with 17,000 readers that devotes itself to the pursuit of 'the male body, and all its parts - the most beautiful and erotic thing there is'. I don't know about you, but as a guy that's looking for dick picks, swole studs and nice tight Twink boys to fuck in the butt, this is a place that is certainly relevant to my interests.
Note that most of the content here is 100% user-submitted, so you're going to find a lot of dudes that want to share their amateur pictures. My best advice is to head on over to the 'top' section and order by month: this way, you can see the cream of the crop and hopefully, the cream of them too. ;)
Currently, new material is submitted to /r/ManGoneWild around 25 times a day. That's a pretty good rate, but not all of it is gay, so watch out when you PM guys that are more interested in tits and pussy that getting it in the ass.