I use to feel shame as I did the same as a teen. Masterbation into panties was wonderful! I would use my mom's, sister, anyone's I could find. When I got older I started buying my own. I have a pretty large collection now of my own panties. I actually wear them more than I wear regular guys underwear. My current gf is very cool with it and actually loves playing with me in them. Also I take pictures of me in them often and send them to her as a tease. Don't feel ashamed don't worry about it. Buy your own and if you are ashed or embarrassed to buy them in public eBay is a great way to build your collection.