"PLEASE AHHHH.... PLEASE STOP!" Luke exclaimed, as the goo began making its way to his neck. But in a stroke of luck, the goo stops spreading. Panting and gasping, he was relieved that the goo has stopped spreading, although he is still preventing himself from orgasm as the suit continues to stimulate his genital.
"It... it stopped! Hehehehe..." Luke said with a tired and exhausted laugh. At least he has one less thing to deal with.
His willpower to prevent cumming is great, ever since the time he discovered masturbating he practiced how to stop himself from cumming despite the stimulation. He doesn't watch pornographic materials, only pictures and videos that depict a male being covered and invaded by sentient goo.
He sat down on the bench, his dick standing up. He knows that touching the sensitive organ would make him cum, so he tries his best to not touch it.
A moment of relief soon turned into horror, as a tendril extended outwards from his chest, and making its way in to his face. Luke didn't get to react quick enough, as the tendril quickly shot into his mouth, gagging him.
He quickly felt another wave of pleasure as the slimy and gooey black shiny gag made its way into his throat. He tried gripping the tendril and pulling it out of his mouth, but it wouldn't budge. The goo made its way into his brain and rewired some of his traits, specifically his ability to resist orgasm. The moment this willpower turned off, he gave in. He experienced the best orgasm he has ever felt. He moaned loudly as he fell into all fours into the pavement. His cum dripping from his erect penis. It seems as the device, or suit, no longer needs the semen. However, Luke noticed that the cum was black and shiny, probably because of the weird latex coating his dick. He moans in pleasure as he gives in to the suit. The black cum became a separate sentient tendril and merged back into Luke's body. The gag also retreated and the device detached itself from his dick.
Luke, now covered in this black shiny, sticky latex, is now left laying on the pavement, panting. He fell asleep in exhaustion, sleeping in the cold pavement, although the suit has provided Luke the necessary heat to combat the cold night.