He might still have been fraped and the pissed-off gf either a) found out about the automotive escapade or b) followed his ass after he got another girl’s # right in front of her. Either that or he is, in fact, a big enough dumbass to have posted that himself.
I think Mark is gay. Why else would he refer to the guys that Carla was trying to hook up with as “hot”? Pretty clever, really. He maintains his rep by “doing it” with the random bar skank, but serves his ultimate purpose of getting rid of Carla’s icky girl cooties.