i can't orgasim when i am on top why ??

im a girl and i usually on orgasm when im on top, it depends on the person or the way you're positioned, there are some positions where the guy penetrates you more than usual and others where he doesnt, just keep trying to find different ones until you find one that works well for both of you

Try doing the backwards cowgirl style. That may help. If not then it's either your guy friend is not long enough and you need to find a position that he can go deeper....or your not angled right. that sh*t is importent i swear