One time I decided I wanted to try heavy fighting in the SCA. Really, trying heavy fighting was why I joined the SCA. So I went to an event designed very specifically for new people who might not even be members yet. They had fighters there! I was super excited!
So I went up to the fighter in charge. I explained how I know heavy fighters in other areas around the country and they were really encouraging and nice, and told me not to be shy and just ask the person in exactly his position to help me get started!
He proceeds to stare at my silently for several seconds, then explain that they won't be able to fit me into any of the loaner armor because <waves his hands about half an inch from my admittedly very large boobs>. Then shrugs apologetically and walked away.
I'm still in the SCA. I don't do heavy fighting.
(Also, PS: I've seen some of our most successful fighters from my area. Some of our most successful and really very large fighters. If their man boobs will fit in armor, so will my regular ones. Jerk.)