[NEEDS INPUT] Good friends "admit" they're mermaids even when they're not

@crinrict that would be strange because I created some of the sims this happened with, so unless they autonomously ate the kelp while I was playing the other household I don't know how they could have become mermaids. Also, when I play as some of the sims who have said they're mermaids they have no mermaid interactions, songs, etc available to them. How do I check for the traits?