Other things to consider ....
Never ask a woman how many men she has had sex with
a) it's none of your business
She most likely is going to lie and say fewer that actual and then ask you, you in turn are probably going to lie - why bother lying to each other?!
If a woman asks you how many partners you've had the proper response is
"I never thought that was something you counted, I never felt the need to go make a notch on my bedpost like women were some type of conquest to be counted"
Never ask a woman "was it good for you, or how good was it, or how you compare?" - if you have to ask that's a very bad sign
Many women will tell you that you're the best sex they have ever had, many of those women will be lying or caught up in the heat of passion when those words pass their lips - appreciate it but take it with a grain of salt
As sad as it is, accept the fact that some women can not reach orgasm. You going down and sucking clit for a half hour or trying to bang like you're Superman isn't going to do it if she hasn't been able to do it for herself her entire life -
it's just going to get old for her and then she may fake it and do you really want a woman faking it, do you really want to be deceived just to stroke your ego?
Sometimes in the case of a woman who hasn't been able to orgasm after being with her for some time and trust has been built up you may be able to try some new things and maybe get some positive results
Just because a woman didn't orgasm doesn't mean she really didn't enjoy the experience
If you are with a woman who can multiple orgasm count yourself lucky and soon to be worn out often (still smiling though)