It already has a similar system
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However, it feels like it has less affect on a sims actions than in 3 mainly due to how the autonomy works. In kinky world the desire system functions more like a need, when a sim feels lusty in 3 they could start masturbating or asking others for sex at any moment. In wicked whims, the way autonomy works, it has to do a "check" every I think in game hour? Or maybe half an hour and the game just rolls dice and random sims either get snagged by WW and start doing lewd stuff or they don't. If no one gets snagged by wicked whims "check" then the % chance of it happening next time increases.
I wish Turbo could figure out a more natural autonomy system that functions more like a regular need, the way it is now makes it feel a little too artificial.
Lastly, there just aren't a whole lot of ways to raise desire right now naturally. In kinky world if a sim has an attraction to say, large breasts, every time they see a sim with large boobs they gain desire. Maybe once WW gets an attraction system we'll see it become more natural but I'm afraid as long as autonomy stays the way it is, it will always feel "forced" and a little too predictable, which takes a lot of fun out of sex.