This really hit home with me, but not because laid pipe all around town, if you will. I've been with my girlfriend for 3.5 years. I've grown up Christian and was always told to reserve sex for marriage. So, being an obedient child, I never had sex.
But then I got to thinking, why do we reserve sex for marriage? I believe because it's a symbol of our commitment to be with other person for the rest of our lives. So, shortly after my 20th birthday, my girlfriend and I gifted each other with our virginity.
What struck me most about your post is that you are apologetic about having slept with so many women. To be honest, I've struggled with having sexual desires with other women. This has been mostly in part by how much sexuality is portrayed in everyday life (that and my coworkers are the horniest guys imaginable).
I know that if I were to sleep with a bunch of women, I'd end up apologetic as well. But in this day and age, it's becoming harder and harder to resist.