I have a double mastectomy (55 yrs), and am very comfortable going without a prosthesis. I will wear one for dressy occasions, otherwise, forget it!
It is GREAT! One drawback, though. I need to loose about 20 lbs, and my belly looks bigger with no boobs to help smooth things over. I can see why overweight men look the way they do. Oh well, it still feels good not being strapped up with a bra.