Mark pulled the tag off and shoved the ragged bundle into Dean's hands. Then he shoved his skinny young friend into the dressing room. Mark easily pushed Dean into the dressing room, he was 6 inches taller and 60 lbs heavier than Dean, all of it muscle. Except for his Mark's 9" cock, which took up a pound or two of that extra weight.
Dean was used to being bullied by Mark, but he was laughing this time.
"What the hell is this thing?" he said through the door to Mark.
"I don't know!"
"What does the tag say?"
Dean was shaking out the black ragged leather bundle, and he held it up by what appeared to be the waistband.
Mark started laughing through the door. "XXXXXL size hung and muscle stud slave loincloth.- perfect for the gay couple determined to investigate the extremes of master slave relations! Your own personal giant muscle slave, hairy, humongously endowed, and anxious to do your every bidding!" and get these instructions...: strip naked, put on loincloth, snap shut to size and begin inflation. Only one inflation per wearer, caution, not reversible. minimum inflation time 2 minutes, then as per wearer's or owner's desire up to 5 minutes of total inflation time. "
"Hah hah!" said Dean as he reluctantly stripped. " I guess nothing will change then!"
"That's right Dean," taunted Mark. "You'll still be my slave bitch boy and I will still be your master!"
"Yeah well if you're the master of an XXXXXL hung muscle giant that can only mean you like taking the biggest cock on the planet up your ass, Mark!"
"Hey Dean," laughed Mark, "If you are hung that huge and with more muscle I have I will certainly want that in every possible way!"
"I don't think this is going to fit!"
"Put it on and don't take it off until I say so!" ordered Dean through the door.
The leather was old and stretched and musty and as long as a bath towel. Mark held the too wide waistband and stepped in and pulled the loincloth up to his waist. It couldn't possible fit as it was too large but then Mark saw the snap on the front and buttoned in shut. The loincloth, although still far too large, settled on his hips.
Mark looked at himself in the mirror, he felt the "auto inflator" working as something pushed against his cock. Mark realized it must be some balloon inflator to make you look like you had a huge set of cock and balls under the leather flap. Sure enough, there was a bulge slowly growing under the leather flap.
He realized as ridiculous as he looked in the giant loincloth he had a bit more definition than he realized.
He turned to the door and felt a bit dizzy. Then he reached out and pulled the door open. "Okay, homo master, here's your huge hung muscle slave!" again he felt a bit dizzy for a second or two. He looked across at Dean, who was gaping with laughter, but stopped suddenly.
"I feel dizzy", said Mark.
"Sit down here on this bench," said Dean. "Just catch a breath for a minute."
Mark sat down and felt compelled to please Dean. He glanced at his watch and sat, breathing and waiting for 60 seconds to pass.
"This auto inflator is still going," Mark said. "Makes me look huge hung with the inflation!"
"Hah hah hah, you sure are muscle slave giant!" Dean felt a bit off too. Maybe the store was too stuffy? He thought Mark looked great in the loincloth. But that was weird, Dean wasn't into guys! Although he had to admire Mark for secretly working out, he looked a lot bigger than he had last time Dean noticed, even sitting down and resting with his head down and his forearms resting on his knees. And Mark was hairier these days too, Dean realized as his cock gave a throb in his pants! The feeling scared Dean so he said, " rest here for a couple of minutes and I'm going to go open the front door to get some air in here. If you feel up to it find me the outfit you want me to wear and I'll try it on. A bet is a bet!"
"Hah hah, okay, master," said Mark. Master had fallen off his lips without him even thinking about it. Dean made his way to the front of the store. After two more minutes exactly Mark stood up. The room felt smaller But Mark felt much better, stronger in fact. Very horny, in fact. The balloon inflator was still making his package grow as he felt the leather rubbing against his cock. It was a good fantasy, he actually felt like his cock and balls were a lot bigger!
Mark went to the leather rack to find something for Dean to wear...