Stay in your room and read the spell again.

You look back down at the book with a coy grin. You recite the spell again, and lurch forward onto the sticky mess you've made of your bed. You struggle to keep upright as the crackling goodness envelopes your balls and cock again. After the spell works its magic, you heave yourself onto your bed. Your balls were oranges, and your sac even softer. Your cock even looked thicker, if only to accommodate a thicker urethra. Your cock was buzzing, and begging for another revelrous dump. You pick up a handful of your cum and slather it over your cock. You slap the rest onto your balls and gooch, needing another handful to finish your balls up. Feeling thoroughly filthy, you pump your greased cock, this time aiming down to the foot of your bed from your position at the headboard. With your other hand, you massage and kneed your swollen balls. It felt soothing, like they were constantly aching from producing such levels of baby batter. You lasted a little longer, but ultimately met the same fate. Your balls screamed their orgasm at you, and you fall on your back. Your body goes limp, your arc shooting straight up at the ceiling. It splats against your ceiling fan and the hardwall above, before slopping back down onto your crotch and the bed in from of you. Your cock was pumping ropes and searing with pleasure for a hot minute. the last rope arced right onto your race, half in your mouth gaped open from the mind break.
After you came to, your cock rested hard against your belly, and the bed in front of you was a mess. Cum was still dripping from the ceiling, into the swamp of cum that once was your bed. You sit up and dig your hand down into the sloppy mound. Eventually, your find where your quilt begins, and lift it up. Strings of cum connect the quilt and your mattress as you pull it up. Everything is wet, slimy and steamy. It looks like a very inviting place to fuck your mattress.