Matt had a number of subroutines installed so that his body could take action without his conscious mind having any input. Mostly these were mundane things so he could sit back and relax while his body did his chores for him, but he did have a number of ones designed for his own entertainment. Grinning internally, he selected the 'masturbate' option and waited to see what his new form could do. He felt himself stiffen, and even though he knew what was coming a part of his mind still panicked about the fact that his body was now out of his control. What worries he had were instantly banished when his cock started vibrating, sending waves of pleasure rushing straight to his mind.
Oh yeah, he definitely made the right decision to turn into an android, he thought as he stood there, letting his cock do its thing and just going along for the ride. This was already better than any sex he'd ever had and he didn't even have to do anything, he was in for some real fun when he started testing his limits of what this body could do. His arms started autonomously roaming across his body, causing surges of pleasure wherever they touched. Even if he hadn't given up control to his body Matt doubted he would have been able to do much, his heightened sense of touch meant that the stimulation was so overwhelming that it was taking most of his processing power just to deal with.
The program knew exactly what he liked (makes sense, he thought, it was a part of his mind now) and his body continued to drive him wild. His cock seemed to be pulsing with ever greater intensity and his hands were ravishing his new body, Matt relishing the feeling of his plastic hands on his hard plastic casing. Matt's hands tormented his nipples and even started playing with his asshole, Matt moaning relentlessly as he finger-fucked himself.
Matt gave himself completely over to the pleasure and simply stood there for hours, doing nothing but enjoying the sensations. He'd positioned himself facing the mirror so he could enjoy the sight of himself, and seeing himself; still recognisiably him but unmistakably artificial, in his current state looking like a mindless immobile automaton, practically made his mind cum. Eventually an insistent flashing on his UI warned insistently that he'd used up too much power and was in danger of running out, but the dominant part of his mind didn't want to do anything that would interrupt the pleasure program.