I'm kind of a little slut?

I'm kind of a little slut. I try to be good, but I usually end up going down on some guy or getting on the Internet and searching for someone to come give me a quickie, even when I'm in a relationship. I think I have a problem that I just cannot seem to get a handle on. In 15 years of having sex, I've been with I know for sure over 100 guys, and I cannot even remember all of them. I get a real thrill from being with strangers and I used to fantasize about being a hooker, being raped or taken advantage of by a gangbang - it seemed the more anonymous guys with me the one woman, the better. I think I have real issues, even though they don't surface on a constant basis.