"Damn you are a big stud" Jeff marveled at just how huge he had made the Mailman.
No longer the slender postman that he used to be, the Mailman had ditched his clothing and stood naked in the middle of the room with nothing but a pair of satin black posers. His rounded pecs were two muscular slabs of meat, capped with large nipples and sitting on top of a narrow waist. His lats flared out as he posed for Jeff, giving his body that much desired V-taper that bodybuilders dream of. His thighs were as big as tree trunks - obviously well rounded from the multiple workouts that the messenger did between shifts.
Jeff's eyes wandered to the gigantic penis resting snuggly in the black posers. He licked his lips absentmindedly as he concentrated on the huge man's tool.
"Awww man, I want that dick inside of me right now" hummed Jeff as he raised his bare ass in the air.
The Mailman grinned cockily. Without saying a word he pulled his posers around his redwood thighs, revealing the massive uncut dick and lemon sized balls contained within. His member hardened to attention as a feeling of sexual hunger swept over his body. He reached over and kneeled on the bed. The weight of Jeff was fairly inconsequential lying ass up, but the weight of a 270lb bodybuilder on the double bed caused it to creak slightly under the strain.
Semi-hard, the Mailman could not wait another second. He thrust his member into the gaping hole, causing Jeff to let out a muffled yelp. Each thrust of the hulking man wracked Jeff with a new wave of pleasure as his penetrator's cock slowly grew harder inside of him. The Mailman's balls slapped against his naked ass, churning with hot man seed as he fucked the young teen's hole.
"mmmhmmm fuck yeah ... mmmhm don't fucking stop ....." Jeff moaned pleasurably.
The Mailman wiped the sweat off his furrowed brow as sweat began to form on his body. Amongst the pain, Jeff felt the room to be a cool room temperature. The cock inside of him however was starting to heat up. He felt the balls of the bodybuilder sticking to his ass.
"Do those balls feel ... bigger?"
He started to hear grunting noises coming from behind him. The noises slowly became deeper and deeper, changing to guttural moans of pleasure.
***PING!!***
Suddenly Jeff heard the sound of fabric stretching and snapping. He felt the paws that held his waist grow with each passing second, and the massive tool expand further inside of him.