When one finally becomes intimate with their partner and then after a romantic moment, then inserts their penis into what resembling what looks and feels like a dry mountain less dessert from Dune.
Dude: Dude Pat Mccloud got it on with his girl last night?
Other Dude: Really?
Dude: Yeah, and she was as dry as death valley.
Other Dude: AHHH my bro was SANDWORMING IT!