Pain for the girl during intercourse?

Another question I have is how many women have pain during intercourse? I realize there are many reasons for this but do wonder if the partner, type of penis, style of sex, etc has anything to do with it. I have never ever had an issue with pain. I enjoy a well endowed penis and am always up for fun. My husband has a lower libido so I try to understand.  I am curious what factors men and women think contribute to pain during intercourse for the female.