I was always taught it was a sin not to wait until marriage, so I had a great sense of guilt in regards to thinking of sex or sexual activity when I was younger.
However, truthfully, I am extremely glad and relieved I did not. Personally, if I only ever had the one I married in that way, I would always have a sense of wondering, I would always feel like the student, and inadequate, less prone to experimentation. As in all things in life, I needed experience and like to think of every aspect of life as an evolving journey.
I still am not married, but I have sex, so I still in respects, do not wait until marriage