Is it normal to have a zip fetish?

I did have the fetish well before I reached puberty, I enjoyed wearing zip up tops ever since I can remember, I never thought of it as unusual until I hit puberty because the first time I masturbated I was thinking of a zip up top, intense feelings of happiness and pleasure mixed with confusion and "why the f*** did I wank over that for?". I don't remember ever being fascinated with zips and then have it slowly develop into something more, something must've happened to cause the fetish but it must've been early on because I don't remember anything happening and what gets me more is why i get more turned on if it has a small logo on the upper left hand position and it has to be in the right spot, like it doesn't work as an extra turn-on even if it's only a couple of centimetres out of the correct position, and only certain types of logo too, for example, the adidas logo works as an extra turn on while the north face logo doesn't, the logo thing I really don't understand at all. And I'll have a look for the anime thing you told me about.