"This is so good," the man said after taking a long swig of his beer. "It really hits the spot."
As he spoke, his left hand went behind him and scratched the back of his jeans where a noticeable bump was forming. "Unnfff!" he grunted, closing his eyes slightly. "That feels good too."
Paul smirked, taking a swig of his own beer as the man continued scratching his backside and then bent forward, pinching the growing bump as he did so. "Oh yeahhh," he moaned, squeezing it between his fingers. "That's fantastic!"
Paul gaped in astonishment. A couple of guys nearby were also staring, one of them scratching his own rear as the man set down his beer stein and gripped his backside with both hands. "Ohhhhh," he moaned hoarsely, "my ass!" The bump on his butt was now visibly throbbing. "My jeans..." He twisted to look behind him. "They're so tight!"
"We can see that, dude," one of the onlookers commented. "What have you got in there? A baseball?"
The man groaned, grabbing hold of the ride rail and pushing his butt out further. His jeans indeed looked tight - not just around his butt but his thighs too - and the bump above his crack was now a prodigious bulge!
"Augggghhhh!" he groaned as it pulsed in and out. "It feels awesome!!!"