I don’t mean the ones you controlled but rather the ones that are around you.
For instance I had a fire and the fireman Sim came and he wouldn’t leave. I admit I asked him to “hang out,” but he just stayed and stayed, The next day I asked him to leave and he left the front door and came in the side door. Then I aksed him to leave and he came out one door and went back in.
So I tried arguing with him and the fireman went outside and went to sleep or nap on my lawn chair. Then I gave up and let him stay and after three days he left.
Another time my son toddler kept going outside in the snow on his own. I would put him in the crib and then when I next looked he’d be out in the snow.
In another game, even though there were plenty of chairs, my wife would eat pizza on the toliet. She ate other food at the table, but pizza sent her to sit on the toliet and eat…
I had a Sim neighbor who would not use the bathroom in my house. She would come over and wet herself everytime. I could never figure out why. There were no obstuctions to the bathroom and other Sims would use it but she would come over just to pee on my carpets.
Would that Sim be an ex- of one of yours by any chance ?
I once had kind of the opposite happening : I had deliberately engineered a Sim to be as slovenly as possible. He’d never do the dishes, never clean anything, littered the whole place, was content with cursing at clogged toilets without ever attempting to fix them… and then one of the neighbours started stopping by once in a while just to hang out, spend the whole time cleaning shit up (I guess he had some type of germophobic OCD ?), then leaving. My Sim would play videogames on the couch the whole time.