Please no autonomous woohoo

I have one couple who woohoos autonomously. I do use mods, but am not using anything to increase autonomous woohoo odds or anything. It's really only this one couple that I see on a regular basis. One of them is a romantic sim, the other isn't. Sometimes it's a bush, or rocket, sometimes it's a bed. However, I haven't seen my other couples do this so I wasn't really sure if it was something that had been nerfed or disabled but I don't think it has. I think the odds of it happening just aren't very high or maybe if there's other factors involved like them both being very flirty?