To clarify, roughly 80% of women can achieve orgasm during masturbation, depending on which study you choose to follow. Oral and manual stimulation depends on who is doing the stimulation, so there aren't any direct numbers. Orgasms during intercourse happen much less often...less than 20% of women report that they have actually had an orgasm during penetrative sexual intercourse.
So, if you're not experiencing orgasms during intercourse, know that you're in the MAJORITY on that. And, if your parter tries to make you think that it's YOUR fault because his past lovers have had orgasms that way...the past lovers were probably faking it. Don't let ANYONE make you feel that you're not normal because you don't have an orgasm during intercourse.
I hope that helps you, and know that there are MANY books out there on the subject of orgasm. Let me know if you'd like any suggestions.
Take care, and good luck on your pursuit of pleasure!
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