I'm a healthy 24 year old female and I have always only been able to have an orgasm on top. The man I'm dating now gave me my first orgasm in a few different positions a few months ago but now it doesn't happen anymore. I am able to orgasm using a vibrator during sex and when I masterbate with clitoral stimulation. I feel bad for him because he thinks he isn't doing it right, it still feels good, I just don't get off. I would absolutely love to, but I was just wondering if it was mind over matter or what, because I have been this way since I became sexually active.