Orgasm is usually achieved through clitoral stimulation. Intercourse concentrates on the vagina. Moreover, you are better equipped to achieve orgasm (masturbation) than a male is in giving you one. You can feel exactly how to give yourself nice feelings. Your partner is only guessing.
I'm intrigued re what women feel etc.. when orgasming. If you want to correspond, my email is guydebyl@yahoo.com.au (guydebyl at yahoo dot com dot au)

6 years old. It was fantastic! My Dad knew exactly what he was doing.

16yrs old, it took about 3months or so?… and probably their partner is just isn't doing it right not enough intimantcy and possibly wrong partner

I was really young, like 14 when I first had intercourse.
It was at least a year later, maybe two before I had the big 'O' and it was probably from oral not intercourse. I was with the same partner for five years and things just kept getting better for me in that department but I could still only O if I was on top. (still that way but don't tell my husband, haha, sometimes I fake for his ego)
I think it's more your own state of mind then anything else.. when I prime myself that it's going to be good and get really mentally ready for it it's always better then when I do it just to make my husband happy.