I wouldn't say that either of you is "wrong". You both have different ideals in what you do/don't like.

Your gf sounds as though she feels emotionally threatened by your fetish. You both say that you're willing to gives up your sexual fetishes for one another, but that really could lead to resentment etween the two of you quickly. Perhaps a better way around giving in to one another's discomfort would be to talk it out openly. Why does she feel so threatened? Would she be more comfortable if you preferred dirty movies or magazines?? Or, does she want to be your one and only sexual fetish?

On your side...when did this fetish begin? Any idea/s how it began? What if your gf were to dress up like a stuffed animal? Would that be the ultimate arousal for you, or completely separate?

Don't feel as though you have to answer all of these Q's to me. They're just things for you to think about & try if applicable. I hope that it helps you! Maybe both of you could limit your fetishes a bit ~ and that would keep both of you happy and satisfied. Take care!