Cuckolding is the sexual fetish in which men watch their wives/girlfriends have sex with other men.
And you were only just wrapping your head around air sex.
Editorial note: Whoa! You've found a super-old post here on BuzzFeed, from an earlier era of the site. It doesn't really represent where we are anymore, and may in fact be totally broken, but we're leaving it up as a part of our early history.