Maybe there's a mod that modifies the behavior so interactions like that are "autonomous" but they leave that out because they either assume everyone uses that mod, or because they're being sly on purpose (definitely this one).
It's been a
long time since I played with TS2, but I think I remember hearing about a mod to make flirting more likely to happen. Risky woohoo, maybe? That device you could buy that had a ton of cheats enabled on it? The mesh was that science career console, I think.
If you play TS1 and are looking for custom content, the
Internet Archive has a ton of stuff. I used to hang out on CTO Sims when it was an active forum. They saved a shitload of old CC from long-defunct sites. I even recolored a few objects there. I haven't looked at the IA's archive of their stuff, hopefully it's complete.