Anal sex:
Any video where one man is fucking another man up the ass, with or without a condom, with or without cum.

Blowjobs:
Any video where two men are present and one man is sucking the other man's cock or both men are sucking each other's dick (aka 69), without emphasizing the gooey reward of cum.

Cumshots:
Any video where cum is at least somewhat [explicitly or implicitly] emphasized.

Gay sex:
Any video of two men sucking, fucking, or performing more than one sexual act during the video clip.

Group sex:
Any video where more than two guys are having sex or an implication of more than two men are participating in the act within the video.

Other porn:
Any video that does not fit into the previous definitions. i.e. One man jacking off, a hot guy with his shirt off, a hung stud giving himself a blowjob, etc.

Personal videos: