I need Spamton to regularly get flashbacks of times when he was raped by either randos he pissed off, customers who decided he owed them more than he gave, or situations where he was sexploited in Cyber City etc and then Spamton's fucked up, glitched body starts getting wet and eventually cums over it during said flashbacks.
Imagine him crying and spiraling into more flashbacks that keep making him wetter and cum more about it until he's exhausted, dehydrated and hurting/aching... Imagine the forced afterglow, imagine the FEAR, EXHAUSTION AND SHAME of it afterward.
(Also okay okay what if he 'raped' himself somehow, like, if he had a tentacle dick/pussy combo, then his tentacle could like, not be completely under his control and even LESS control when he's physically horny, so like, have him fuck himself even when he doesn't want to maybe, but especially during the flashbacks. Just imagine his tentacle dick wiggled around looking for hole to instinctually fuck, first hole it finds? His own pussy...)