Is it weird to get turned on think about being a cat ?

Only if you think it is. Otherwise, you are you and will feel how you feel. I've been learned that everyone is unique and it's not up to me to judge you.

Everyone has their fetishes. I have mine. (I am not inclined to tell them at this moment but I have unique ones) As long as you're not trying to hurt people (exception is bdsm) or yourself. I don't really judge often at all and this fetish while unique isn't a bad one. Have more confidence in what you like/dislike.