Is it normal to have a fetish?
There is nothing intrinsically unusual or odd about possessing such likes, types, and desires.
As long as everyone participating give consent, it’s acceptable to include your fetish during partnered sessions.
It is indeed easy to feel and assume that you’re strange and lonely if you have a fetish. This isn’t something that most people publicly speak about, because there’s a taboo or a stigma whenever you bring up this subject.
If your obsession with some part of your desire is interfering with your life, it could be worth speaking to a sexual fetish-positive counselor. Otherwise, embrace the pleasures of your fetish as what it is!