The social debug dialog just grabs random Sims and strings. I think in this case I was trying to get a specific Sim (who was not a cat) to accept becoming a roommate.

Yeah, you don't get a choice if a cat wants to be your roommate. XD

Now I want a hack where the cat distribution system makes cats randomly show up at sims' doorsteps and want to move in. XD

At one of the houses I downloaded, stray cats kept getting stuck on the porch, so my Sim who lived there basically had to adopt them or they'd starve. I don't use that house anymore but I still play that if a stray cat keeps showing up on the lot, I take it that it's insisting on being adopted, so I use the Sim Blender to move it in.

Sanjay Ramaswami aggressively smustling in the cutscene background as Priya gave brith.

I raised 18 of those in RL. Some of them moved in in small groups

Sorry for double posting.
One of my sims just fell in love with Amin Sims.
Aww, he is such a cutie

He's the OG naked hot-tubber. Love him. I remember when I first was playing, I thought he was some kind of stalker because he was constantly calling all my Sims. It took me a while to realize he was just super outgoing.

He is a social sim and has 15 friends when you move him in He is very likeable, and I enjoy playing him.