Yes I feel ashamed. But I don't only feel ashamed about who/what I'm attracted to or what I have sex with.
I'm also ashamed about my social status, ashamed I didn't go to a better school and ashamed I make less money than other people I know. Sometimes I'm ashamed that I ate a cookie or a piece of cake after dinner! I know these aren't on the same level as sex. but I just want to show that everyone feels shame some times about stupid things. Sex isn't stupid and we're taught from a young age that standard, vanilla, government issue sex is shameful so of course anything different from it will be that much more shameful.
Shame comes from your fear of being different. When you are here hopefully you don't feel as different because everyone here has similar interests. It is unfortunately, but you will probably never be able to share this part of your life and be your real self with the majority of your friends or family, but really, how much of your sex life do you share with them anyway? Its just a part of life that we show different parts of our personalities and interests to different groups of people. Be cautious who you share this part of your life with, but don't feel ashamed about it. Unless shame turns you on, then shame on you!
If the shame ever gets to be too much for anyone and they are thinking of doing stupid things they should come here and post. You aren't alone out there.