A fetish? or something completely reasonable?

I've had this my whole life. For some reason, I really like seeing girls wearing masks and the like. Especially ones that cover their entire head. It got so bad I used to take my camera phone into stores around Halloween time just so I could try and catch them in action. The same thing goes when I see a girl putting or wearing a bag over her head, or a blanket or whatnot.

Am I nuts? It seems really strange to me?