When I was in bootcamp for the Navy, we had one guy who found out he was XXY. He was a very tall, big guy but seemed to have disproportionally low muscle strength for his size, and had noticeable breasts that looked more feminine than the average man boobs. I think the doctors took notice and ordered some extra testing. Unfortunately it was a medical disqualifier for some reason and he was processed out. It was pretty sad because he wanted to stay, and when you had people otherwise quitting and giving up it didn't seam fair.