I still try to figure out, what did Michael mean when he told Kay, there have been things going on between men and women? (When they are in the hotel and Kay says she is leaving)Was it that men have their business and their wives don't need to know? Or was he referring to her being depressed over what he thought was a miscarriage?

Yeah Ive always thought it was about his business.It was a man's world and women had no part in it. There were things happening that she could not understand.