What could be the total percentage of husbands in the world cheating on their wives?

We meet questions about husbands cheating on their wives in Yahoo and also in the media. What could be the total percentage of husbands kind in the world together? This percentage may vary from one country to another.

What could be the total percentage of wives in the world cheating on their husbands?

We come across the questions about wives cheating on their husbands in Yahoo and also in media. What could be the total percentage of such wives in the world taken together? such percentage may vary from country to country.