If you want to prove or disprove any 80/20 rule, providing statistics about average is meaningless. What you want are statistics about repartition of wealth.

Any metric involving a man with a woman is going to be meaningless. Everytime a man sleeps with a new woman, it increases the metric of average partner count of both men and women. If you get different numbers, you might want to check if it's not because of a restricted age group.

Thank you.