Not in any big hurry to get back home naked with two sets of male genitals, Lewis decided he might as well take some time to make sense of what Dei gave him. His two simultaneous erections felt good: he knew it was freakish to look at, but feeling the pulsing pressure of blood in his two phallus's was making him very aroused. He grabbed his right cock first and started stroking it, amazed that it was originally only the right half of his own cock. Now, it was indistinguishable from the erection he'd jacked off many times before, except that he could feel another one right beside it. He occasionally bumped his left cock while he masturbated, surprised by the feel of his two penises getting knocked apart and then flexed back into position by his tendons.
Eventually, Lewis felt the familiar tension of his point of no return, but he only felt it in the right half of his groin. He came hard, but he only came through one penis! His right dick softened, but his left dick was as hard as before. It was strange that he could feel horny and spent at the same time, but that's exactly how he felt. His leftward pair of balls were begging him to find out just how it felt to have a second orgasm on his left side and satisfy the sexual urges that were still reaching out to him from over there. He grabbed his erection and started pleasuring his left cock slowly and meticulously, wanting to really savor the build-up to this one. He tickled his flaccid right cock a little as he did so, but it remained soft.
About halfway through the process of giving his left cock what it needed, he realized his bladder felt full. Knowing from experience that it was hard to pee through his erection, he instinctively knew it was pointless to even try to drain his waste through the left cock right now. He realized, though, that he didn't feel that same instinct in his right cock anymore, because it felt exactly like the flaccid cock that it was. Understanding on some level that he could direct his flow through that channel if he wanted to, Lewis did so, and felt a soothing surge pour into one urethra even as precum was trickling its way out of the other. Amazed that he could piss with one cock even while he was jacking off the other, wryly thought about how useful this might turn out to be if he didn't get locked up for indecent exposure.
Lewis was still shaking his leftover piss out of his right cock when his left cock came, spurting a second load of sperm on the try to match his first. He was already fantasizing about how it might be to cum with his cocks at the same time. He'd have plenty of time to try that later, though. For now, he had to somehow sneak home and cover up his twins.