Romantic wants related to other sims are rare?

If you interact a lot with a certain Sim, the temporary Want on the right might roll something related to that Sim. My Sim was on a date with another, and halfway through the date he got the Want to kiss her. I agree though that it doesn't seem to happen as often as with Whims.

A fun one though was to "Be disliked by..." He and his neighbors don't get along, and he already had a red relationship with one of them. He wanted to take that negative relationship all the way. :D