Well tbh, not exactly.
The following is what I confront: To whore the MC out is workable; to have random sex(like invite an NPC home and trigger some scenes) is workable as well. To masturbate is also not dangerous -- the scenes are loading well.
The only issue is, when I decide to pair my MC with other NPC, making these two a couple(or even further, spouse), I'd definitely like to make them have sex. And then, my game dies -- not even possible to see the hot scene.
To simplify it, my issue is that the MC can normally sex with other when she's not on a date or married (or say, the default stat as the game starts), but once not being single, proposing sex to partner will directly lead to the game freezing, as if my MC were destined to be a fuck machine with strangers(or other NPCs who are just acquaintances rather than intimate one)
With such issue, I now am afraid to get my MC dating or marrying, lest another error takes place and make me lose my marble