When are you guys going to let players join each others game?

The Sims series is really one genre of game where it completely doesn't make sense. Life simulation and real life to me should stay completely separate.

Adventure games, first-person shooters, racing games, party titles. Yeah, it makes sense. I've messed with several racing titles (and played multiplayer), I did a couple online RPGs as a kid, and I have Garry's Mod, but it gives me vertigo, makes me nauseated, and causes one heck of a headache (don't know if it's my autism or what) so I avoid playing it.