Is it normal that i steal my friends clothes and wank in them

Whenever I go to my friends house I go to there room, saying I'm going to the bathroom, and wank in their clothes (usually jackets) while smelling there shoes. I know it's weird but I want to know if it's only me.
-Dan
Ps: I only do it if their jacket is like a windbreaker(like shines nylon) it turns me on