This occurs when someone with whom you have recently had sex also recently had sex previously with a "third party". You are then said to have had sex with third party by proxy.
Jim: Hey, Ted, you know that Julie chick you were bangin' last night? Ted: "Yeah"
Jim: Man, she has been doing that nasty dred locked gansta, Willie, for a month.
Ted: So?
Jim: Ah Man, you had sex by proxy with the dred man.
When an individual sends another person or device to perform sexual actions to the respective partner. During the intercourse the individual sends commands to the person or device to which said person/device performs.
"hey dude I had some proxy-sex"
"you mean e-sex?"
"No dude, proxy-sex"
Ruler of Lake Titicaca. Rumored to have a bunghole that gets very angry if it does not receive toilet paper. Cornholio the Great is often seen walking around with his shirt over his head and his hands in the air, chanting songs about his power, and his bunghole.
"I am Cornholio! You do not want to face the wrath of my bunghole, for I need TP!"
Butthead: Shut up, Beavis! (uh huh huh huh)
Beavis: Um, okay. (heh heh heh heh).