Okay, this has been bothering me for a while now.
I have this fetish/obsession with panties. Now, the problem is that for a few years now I've been sneaking into my best friend's (a girl) underwear and taking pairs of her panties and sometimes, when I know she won't be back for a bit, I jerk off into the crotch and put them back. Now I do this with her clean panties, not what you would find in the dirty laundry.
She once caught me looking through them and her and I had a discussion about my fascination, and she even gave me a pair that I liked.
She's a good friend of mine and I've know her for 15 years. We went to elementary, middle and high school together. As of today I'm 20 and she's 19.
Now I don't know if she knows what I'm doing or not, because if she does, she hasn't said a word to me about it. I've been doing this for about three/four years now.
My question is what should I do? Is this a big problem for me? Am I sick and demented to be doing this?
Please Help Me!