Autofellatio. One Word. The act of orally stimulating one’s own penis. See image here.
Auto Fellatio. Two words. The act of receiving (or giving) a blowjob in an automobile. I believe auto fellatio can be segregated into two broad categories. One where the car is at rest, preferably tucked away and hidden from view. And one where the car is in motion, being driven by the individual on the receiving end of the blowjob. For the purposes of this article, I’ll ignore instances of being fellated in the back seat while someone else is handling the driving chores. I seem to recall seeing a few of those on Taxi Cab Confessions.