Phobic...

Z: Did I tell you I'm afraid of snakes?
Mom: Since when?
Z: Since now. I just decided.
Mom: Oh. Okay.
Z: Remember that time at the zoo when they were feeding all the snakes those dead rats? That was totally sweet!
Mom: People who are afraid of snakes probably didn't think so. I certainly didn't think it was cool.
Z: Oh. (pregnant pause) Turns out I'm afraid of lizards instead.