Yes, I am. I am 23 and have never had the opportunity. The last girlfriend I had was in middle school, who I dumped because spending time with her was cutting into my video game time?! In retrospect that was idiotic, but young folk are prone to making poor decisions.
I spent the rest of middle school and high school playing/making video games, playing basketball and hanging out with friends. I spent all of university studying and playing sports. Now I don't do anything, much of this activity involves sitting in my house.
I don't feel "proud" or dignified and I'm not embarrassed or ashamed of it either. Due to the circumstances of my life I haven't had sex. When the opportunity shows itself in the course of my life I will most definitely act on it, though because I have a bit of hypochondria I plan on being safe about it.
As to whether there is reason to wait; sex has two purposes: reproduction and recreation. If recreation is not your goal, then go ahead and wait. If reproduction is not your goal there are near perfect methods to prevent it. I think it's closed minded to think that sex for recreation is a bad thing. People like having a good time and there are plenty of ways to achieve that, gaming being the one people are most familiar with on this site.
Sex is another way of having a good time. Sexuality is extreme natural to humans and it is natural for humans to have sex as early 12 or 13. The answer is, if it seems OK to you then it's OK because you are human. If you're young make sure to use contraceptives as having a child young can alter your life with lots of responsibility, unless that's your goal.
On a final note, the prevention of human life may not be looked at as right or wrong. But as necessary or unnecessary. In the history of humanity it was once beneficial to increase the population of humans as fast as possible to fill the earth. We have done a great job of that. It is humanities responsibility to ensure the continued success of the race. At some point that means controlling the human population so that it may live within the limited scope of earth. Until humanity finds new grounds for expansion population will continue to be a global concern.