In case you were curious, an Interview with an Autofellator. A highlight:

Imagine having someone suck on your cock who knows exactly what you’re feeling at every moment; who can adjust every variable instantly to provide you with maximum pleasure. Imagine (this one is going to be more of a stretch for non-cocksuckers) sucking on the cock of a man who knows exactly how hard and fast to push, and when to pull out (for those of us who still have a gag-reflex). Having that much control means that I can have a variety of kinds of orgasms and can easily separate orgasm from ejaculation, and shoot a number of loads before having the final orgasm. It isn’t a substitute for sex with other people; it’s a completely different thing, like masturbation squared. It’s like any good sex: Sometimes it’s cerebral, sometimes the body takes over.