Cats may hunt cockroaches, mice, and garden pests on their own.They can be told to hunt mice and garden pests, though they will not always do it.Simply put, when any unrelated Sim is near your active Sims, you might see a push notification of the visitor being attracted to your Sim.As you can see in the screen shot here, a townie is attracted to Pete simply because she caught him studying a new skill.
If it's chosen and accepted, the controllable Sim will call a taxicab, and both Sims will get in and go to that Sim's house.
Dating is a romantic activity where two Sims spend their time doing romantic things together.
This feature is the main theme of The Sims: Hot Date and The Sims 2: Nightlife.
A new feature of The Sims 3 is attraction, which is available with the latest patch regardless of whether you have Seasons installed.
It's a small mechanic, but it can give your single Sims a romantic target in case you have no other plans.