Thanks for the tip, Rachel.
In my Wishmaster challenge last year, my Inappropriate Sim met someone new and, immediately after introducing himself, he rolled the wish to kiss her. Given the nature of the challenge I though what the hey, go for it! So I cued him up for "Kiss" and she accepted! Instant Romantic Interest! With this action he, and I, found out that she was also Inappropriate and Hopeless Romantic/Flirty (I can't remember which). So that's something else people can try.