Anyone else unable to orgasm from vaginal sex?

Have been having sex since I was 15 and I'm almost 21 now. I have orgasmed vaginally maybe a handful of times. It seems the only way I can orgasm is through anal and let's face it that is not the most painless solution. I have tried using a vibrator during sex and I just can't seem to get there. The sex is AMAZING! Why can't I orgasm???