Almost as if on cue to your orgasm, the hatch in the wall opened yet again. Feeling energized, you got up and walked over to examine it. It was odd to balance on your new giant feet, but you quickly became used to your new stance and gait. You saw the hatch contained a pair of dirty jeans, and grabbed them off the shelf as the hatch closed off again. The jeans have mud and oil down the legs, and smell worn. Instinctively, you pull the inside of the jeans to your face and give it a whiff. It smells like sweat and the smoky scent of unwashed ass. This sensation makes your cock even harder, as you can't wait to put them on. You open up the pants and stick your right leg in, then your left. They're really baggy on you at first, but you feel something stirring as you leave them unzipped to fondle your cock through your boxers.
You feel a series of pulses go down your legs as you stroke your cock. Each rhythmic stroke sends pleasure down your legs, taking turns: left, right, left, right. Each pulse has your legs get thicker just a little bit, and hairs start to sprout from them. Your legs get more macho and manly as you continue to whack off, and soon they fill the jeans in nicely. The pleasure continues to increase as your butt starts to fill in the back of the jeans. It's no bubble butt, but it's accentuated by the sagged jeans nicely. You finally climax, having another dry orgasm in your dirty boxers, as the changes settle. You moan loudly and then zip and button up the jeans, allowing them to sag quite a bit, revealing your boxers to the world.