Is it normal to have a fetish for glass bottles?

Is it normal to have a fetish for glass bottles? Opaque glass bottles to be exact. I've always had an interest in touching and feeling glass bottles, and only recently, I've started to feel slightly sexual while I'm feeling a glass bottle. It seems to be opaque glass bottles that trigger this the most. It's just the way that they look and feel that makes me start to feel horny. I /need/ to know if this is a normal thing or not.