[NSFW] What is a fetish and is me liking plushies a werid thing?

Okay so today I showed my sister this 40’’ wolf Plushy and it came with some other stuff like a frame with a certificate and pictures and what not of wolves, but I guess my mom found out from my sister too and she said “I need to stop this plushy fetish” or something like that. I mean I though a fetish was a sexual urge towards something like I like foot fetish but Sure I guess I have a plushy fetish sometimes, but I’m still not so keen on it’s meaning mind if you guys explain it to me a little bit clearer. Oh and do you guys think I should stop this I mean, yeah I’m 13 and a guy, but I mean I should like would I like and I like having plushies. But what do you guys think?