3,689

A 3,689 requires three parties, and features a person in the center of a 69 sandwich alternating between the person on his/her left and his/her right. For infinity, forever, eternally.

Sam, Dani, and Max were 3,689-last night forever, until they took an energy drink break and a nap, and then they went right back at it. I heard they mixed it up a little and rimmed each other a lot, too. I'm so jealous, sounded like fun from the other room.