Ladies! Don't fake an orgasm!

Neither partner should fake anything, nor should they do the opposite and degrade the other for not being better.
Instead, why don't you be OPEN with each other? Take the time to communicate and learn for each other to make the experience better for both of you.

I can't speak for other people, but I know that I would much rather know the truth and learn what my partner likes than be given an attempt at a pseudo "ego boost". Seriously, if you're not satisfied with your partner's technique, tell him/her/whatever about it! Don't be a jerk about it, of course -- if you know they're sensitive, be a bit more polite about it, maybe say something like "That was wonderful, but I think we could both do even better if we discussed about it and learn more about each other's likes."

If either or both of you don't know, you could experiment with yourself and masturbate in your own time, or ask your partner if you could both try new techniques, 'kinks', etc. and experiment with each other to discover your interests and preferences.

But please, above all, you should always try to be open with one another when in a relationship. Never keep things secret or hidden, it'll only lead to a caustic relationship.