Everyone loves a cute guy butt, right? Well if you're one of those people that is willing to admit that a nice ass turns you on, check out Reddit's /r/CuteGuyButts. The name says it all, and with over 8,000 subscribers that have joined the subreddit since in began way back in 2011, to me, this is pretty much the ideal place to be if you like guys with nice behinds.
I will just warn you: Cute Guy Butts isn't devoted to gay material, although out of the four subreddits listed in the 'Esteemed Partners in Debauchery' sidebar list, two of them are gay-focused.
Content here is all amateur, which means that you're going to find users of the site submit the pictures of these cute asses. Essentially, it also functions as a place for you to reach out to people on the site (in a respectful manner, obviously) to talk shop and potentially get a little cyber out of it. I've done it myself and it's fun, so go right ahead if you like cute guy butts!