He doesn't seem to notice at first

Robbie shifts awake, as you continue to lick and suck on his morning wood. You hear him moan, not even attempting to move the covers to find out who you are. That idiot, he's a super nice guy but was never that bright.

You continue to bob your head up and down on his shaft, taking breaks to kiss the tip and lick the sides. It's pretty **** for a prank, but that's just the sort of guy you are! With a prank like this, you've gotta give it your all.

Robbie keeps moaning as you take your mouth off his cock and start jerking him faster. Taking the opportunity, you slowly take in each of his balls into your mouth. They're pretty hairless, which you're thankful for. You circle your tongue around each, knowing this probably feels amazing for Robbie.

Sure enough, you feel his hand snake through your hair, rubbing your head as he moans with pleasure. You begin to feel his cock start to pulse. Oh god! Where would the funniest place for him to cum be? You know!

Jerking his cock faster and faster, you get ready for his big load. His balls begin to tighten up, and as they do, a hot jet of cum shoots out and hits you in the cheek. You cant help but gasp at the velocity and quantity but you quickly close your eyes as he starts cumming buckets. It shoots onto your forehead, your chin, your cheeks, everywhere.

Eyes still closed, you feel the covers uncover your body. Haha, you must be such a sight to see right now. His own roommate covered in his load.