They are masters at hiding it. I once fired a man because I found out he was cheating on his wife. When I confronted him I was told it was none of my business. My response is if you wife whom you made a vow with cannot trust you, I know I can't. The only reason I caught him is I overheard him bragging about it with other employees which is also a form of harassment of female employees who had to hear it, but did not know how to report it.