After having anal sex with someone, a man then inserts his penis into their mouth for oral sex.

When you and your lady friend are in the shower gettin' freaky and she squeezes some soap in her mouth and starts slobbin on your veggies like your dong's in a car wash.

when a male either blows a load, or pisses on a females face and then proceeds to flatulate on the females face.

When a guy hits a girl's g-spot and she catches the Triz in a bucket and throws it in his face and says "carwash!"

Oral Sex performed in a car

when you titty-fuck a girl backwards and she licks your ass

while in the act of being naked and in the shower with a woman. the man drops his sac to the lowest point that gravity allows. then the woman proceeds by crawling underneath and between his legs, causing her face to directly hit his soapy testes. thus creating the same cleaning effect as a car going through a car wash.