"You're an adult. You get to enjoy whatever you like."
Stuffed animals? Legos? Video games? Cartoons? I've been made fun of all my life for liking "stupid stuff" or "kid stuff" (even as a kid).
I pay my taxes. I've lived life long enough to know that I deserve to be happy. What kind of miserable shit-head would make fun of me enjoying something? Someone whose opinion has no value to me, that's who.