Luke, curious to see what's gonna happen next, did the next step of the instructions. It's easy enough, as the black latex covering his penis is gooey. He gripped his dick, and the second his hand met his penis he felt an immense amount of pleasure and arousal. He continued to pleasure himself, and it would seem as the device is affecting his ability to ejaculate, as it has been 15 minutes and he still hasn't ejaculated. He's now sweaty and blushing red with what he's feeling right now. The breeze of the cold empty night conflicting with his hot feeling. After a few moments, Luke felt the climax coming and braced for it. Arching back while kneeling, he reached orgasm, and it was one of the best he had. Jets of semen shot out from his manhood, but because of the latex, his semen did not escape the latex covering. The latex seemed to absorb all of Luke's cum, no single drop escaped the latex.
Luke panted and moaned from the pleasure. A naked teenager in the middle of an empty park, panting after masturbating on a strange and unknown device.