Oral sex is widely used in human foreplay, but rarely documented in other animals. [...] Female bats often lick their mate's penis during dorsoventral copulation. The female lowers her head to lick the shaft or the base of the male's penis but does not lick the glans penis which has already penetrated the vagina. Males never withdrew their penis when it was licked by the mating partner. A positive relationship exists between the length of time that the female licked the male's penis during copulation and the duration of copulation. Furthermore, mating pairs spent significantly more time in copulation if the female licked her mate's penis than if fellatio was absent. Males also show postcopulatory genital grooming after intromission. At present, we do not know why genital licking occurs, and we present four non-mutually exclusive hypotheses that may explain the function of fellatio in C. sphinx.
My favorite part about Bioshock is how it functions as an innoculation for the virus known as Objectivism. What group is most suspeptible to that disease? Fourteen year old boys. Who's the target audience of most video games? Exactly. So now there will be an entire generation of guys encountering Objectivism for the first time, and they will already have the necessary antibodies. "Oh, Ayn Rand? Right, I remember that, the ruined, drowning city full of junkies and mutants."
Some people never recover.
You & Me Doing It v. You & Me Not Doing It (2009)
Using that IRAC method we've been learning about, a compelling brief on why we should hump each other's brains out.