Once his hunger had been whetted by the banana, Richard hoped someone would return with more of them. When that hope wasn't immediately forthcoming, he grew bored, rested on the cot on his back, and began to painstakingly groom through the thick pelt of fur covering his torso. The methodical activity relaxed him and provided an occasional crunchy treat when he managed to work some of the larger parasites from their hairy abode.
"Stupid jungle man," he muttered as he dug for an elusive pest able to slip seamlessly through the tangled hairs over his chest. His sausage-thick fingers were not exactly deft at plucking small blood-sucking parasites from a thick pelt of fur.
"Me show him. Keep his stinky body." Richard chuckled to himself at the thought of his "revenge" on the jungle man.
He had even grown more accustomed to the rank odor of his new body. While his former self might have wondered why the stink alone didn't cause all of the clinging parasites to drop dead, his new self found his smell perfectly acceptable.
Although motivated at the moment by a not well-considered spite, Richard began to recognize some other benefits to his new body, beyond the obvious increase in length and heft of his enormous cock. He'd always looked at pictures in magazines of muscle men with pumped forms and wondered what it might be like to have such a body. Of course, he'd never really cared for body hair, especially to the extreme represented by the jungle man's shaggy form.
Able to banish any lingering anxiety, a more relaxed Richard closed his eyes. Within moments, he began snoring so loudly the sound could conceivably have rattled the bars of the cage. He also drooled quite profusely. In his sleep, other changes began, subtly at first. The shape of his skull shifted, giving him a receding forehead and prominent brow ridges. While it had been simple enough to detect the jungle man's humanity, the curse began to push Richard's ties to his fellow humans further off as he slipped down a few pegs on the evolutionary ladder.
As the changes continued, he slept soundly, dreaming completely without a sense of irony at making the jungle man beg him for his body back.