Here’s an article about a poor lady who has never had an orgasm, despite her numerous partners. Its an interesting little read, and it definitely sounds like this lady needs to learn to express herself to her partners better. Here’s a clip of the response:

It’s possible their technique is at fault - men can be remarkably ignorant on how to please a woman in bed - but as all of your partners have failed to help you reach orgasm, it seems it could be more your problem than theirs.

Here’s a movie that might help her, and her boyfriend, out.