When guys are
having sex with girls on bunk beds, when one guy gets tired of humping, the other takes over and his humping motion rocks the bunk beds so
the other guy can keep it
going with his girl while regaining his stamina.
guy 1: "Yo bro bunk bed sex is the best cuz when i get tired, you can fuck your girl and rock the beds for me so i can
take a break while still
getting off."
guy 2: "What!?!?"
guy 3: "Yea man you gotta ride the train at least once
in your life"
guy 1: "thank you!!! thats what im talking about!!"