In agreement with the OP I can offer another example:
When I'm receiving it up the rear, doing anal,and I get off on it, in almost every single pose I switch back to vaginal sex once I hit full excitement.
As another suggestion, it might be fun to actually select your kinks and have your partner work at your excitement level, instead of clicking + when you think it's appropriate.
What about orgasm intensity as an expansion on my previous suggestion?
And just for the hell of it: a volume slider for the slightly annoying in-game music?
Well, just my €0.02 anyway.