Ah, what a simple site name and what a cracking amount of content available! Men.com is owned and operated by one of the biggest names in adult entertainment, so you know that it's going to be good when they decide to venture into the world of dudes fucking other dudes in the ass.
I got myself a membership to Men in order to see what it's like, and man - the quality of the material here is out of this world. They have great parody content (such as Gay of Thrones) and some real niche and taboo material that's bound to put a big smile on your face if you like things getting a little naughty. While you do have to pay for access to the site, you'll get daily updates and access to the entire content archive.