>>2612647i think it was some sort of a challenge?
they are showing him a vid on that other guy's phone, presumably of something erotic like a girl getting fucked, etc. to see if they can get that guy hard
to make the challenge harder, he has the guy on the right rubbing his nipple and the guy on the left actually jacking him off
the guy on the left pulls down his pants to reveal that he did in fact get a semi, so he "lost" the challenge
yep, it's as stupid as it sounds
