There are two kind of match between woman and man. One is mentally match by their long term relationship. Another is physical match between two of them. When they are having a sex, the man's penis and the woman's vagina combine perfectly and work very well. It's commonly said that their inner match is nice. good inner match gives a perfect satisfaction of sex feeling all over the world
John : it was so nice sex.
Emma : i think so, our inner match is perfect.