Mandatory sex parties 

Sex parties in which attendance is mandatory. Most frequently seen as part of a sex course or among couples who practice both swinging and S&M.

"Sorry Kelly, I can't make any prayer meetings this week. I have some mandatory sex parties to attend."

Mandatory sex parties by adelaidepoet October 14, 2009

mandatory sex parties 

A party that is disguised as a typical type of party, but really requires you to have sex throughout the night; Obligated sex with multiple people; Raping is involved. The Amazing Allie from Hyperboleandahalf.com coined this phrase.

Guy 1: Jill invited me to her Halloween Party. You goin?
Guy 2: Nah, the only type of party she has are "mandatory sex parties"

mandatory sex parties by Mandatory sex party goer January 26, 2011

Manditory Sex Parties 

A Mandatory Sex Party is a party where once you walk in the door, you are obligated to have sex. These parties often disguise themselves as costume parties, birthday parties, or baby showers. But THEN as soon as they entice people in the door, they are all "guess what this actually is? It's a mandatory sex party, bitch!"

Then the raping would commence.

"Last night, I went to my friends halloween party, only to discover that it was ACTUALLY one of his crazy Manditory Sex Parties. I had to get 7 stiches in my asshole and 9 in my mouth.

Manditory Sex Parties by CumBucket69HellWhore July 11, 2010