What's the hardest part of being a woman?

Well, it doesn’t have to be the HARDEST part. You may feel that there are many “hard” parts. List all you care to. I’m just trying to get a better understanding of our “better half.” To me, there are SO many aspects of a woman’s life that I’m glad I don’t have to suffer. Thank God I don’t have to go through childbirth, wearing high heels, putting on makeup, menstruation, suffering catcalls, etc., etc. Ladies, help me understand your frustrations.