The Gungan Retreat is a sacred sex position, typically done in college or possibly after. It is basically where you have sex in the missionary position, but you do it on a roommates bed. If you are not the one living in dorm, house, or apartment, and you are doing it in your partner’s roommate’s bed, then you are still participating in the Gungan Retreat.
Doer: “Yeah me and Sally did the Gungan Retreat last night!”
Roommate: “Were you at our apartment!?”
Doer: “Nah don’t worry, we were at hers”