"Oh!" exclaimed Luke. There was a popping sound as his spine pushed downward growing into a tail. The growing tail was pushed inward by Luke's jockstrap waistband. It slid between his butt cheeks following the crack. It was hairless flesh and bone at the moment, but already Luke was starting to itch all over as his dormant hair follicles activated.
[Most people don't know that they have as many hair follicles as most similarly sized furred mammals, but that in humans most of the follicles are deactivated. When a hair falls out that follicle may deactivate, then a deactivated follicle is activated, so that humans don't become hairy beasts.]
Luke's jaws begin to ache. He fumbles the champagne glass spilling it on you. He drops the glass, and discovers that his thumbs are becoming dew claws. He's having trouble standing upright. He doesn't want anyone to see him like this, whatever this is.
He excuses himself and dashes for the shower room. As he rounds the corner, he drops to all fours and gallops down the hallway. Luke's shoes clatter on the tiles as they fall off his feet. Luke is forced to use his new canine teeth to rip his painfully fitting shorts and jockstrap from his body. His shoulders have narrowed, so his shoulder pads have twisted awkwardly around his neck. He stumbles in the hall and somersaults head over tail. He pants with his tongue hanging out. The color seems to be draining out of his vision, the blue and green tiles appear to be different shades of reddish grey now. Luke whines.
"Aw, Luke, boy, you want to go walkies?" says a voice.
Luke turns to see Dirk Whistler standing there in his street clothes. Dirk is the second string quarterback. He had left the party early because he hadn't scored any goals during his brief time on the field. He had seen Luke drop to all fours as he exited the party area, and had followed.
"Drirk?" Luke barked.
"Oh sweet! You sound like Scooby Doo. I don't know if your change is permanent or not, but either way," Dirk says pulling his belt out of his pants.
Dirk drops to his knees petting and holding Luke. Luke isn't sure what to do. His canine brain is identifying Dirk as his master. He sniffs the male human scent emanating from Dirk under the mask of cologne, deodorant and soap, but he still can make it out. It commands and compels him to obey. Luke pulls the jersey over Luke's head and down over his paws. He undoes Luke's padding, and finishes the job Luke began. He removes the jockstrap, football shorts, and socks from Luke's body. The naked dog stands before Dirk. Dirk slips his belt around Luke's neck sliding the strap through the buckle. He punches a new hole in the belt, and stands. Luke barks and jumps up resting his paws on Dirk's hips. His snout brushes Dirk's crotch engraining Dirk's scent on his mind.
You lie in the pile of torn and disgarded clothing. You're still a jersey. The dog curse was channeled through you changing Luke into a dog. You wonder remain unchanged. You wonder if Luke can change back if he's not wearing you, after all you're the one with the curse. It's just the magic spell he put on you channeled the curse into your wearer.
Dirk quickly scoops up Luke's disgarded gear and carries back to his locker. He throws you and Luke's other stuff into his locker. Then he leads Luke out of the locker room to take him home.