A huge kink of mine is marathon sex where insatiable participants are driven to fuck for hours or days. They don't HAVE to be in diapers. It can just be regular sex. they just need to keep going until they collapse from exhaustion, then start again later. Cumming makes them MORE horny not less.

That ties into hyper, which I haven't really drawn much lately, but its certainly part of my kink portfolio. I like the concept of hyper that doesn't require massive genitals (although those are fun) but is just like a permanent hyper-arousal/erotic obsession. Like sex addiction? mmmmaybe >.>