I have yet to see a boy in my office. I'm in no doubt that it happens every day, but the cases I've had contact with all involved young girls, or at least images of them.
I think there is a different dynamic with males. Boys seem to show off by photographing themselves with things, with cars, cash or even tigers. [see link] Girls seem more likely to create images focusing on their person or their friends' persons. There is also some sexual dimorphism at work. Boys simply have less to physically cover, probably making inappropriate or accidentally inappropriate images less likely.
I think there is a different dynamic with males. Boys seem to show off by photographing themselves with things, with cars, cash or even tigers. [see link] Girls seem more likely to create images focusing on their person or their friends' persons. There is also some sexual dimorphism at work. Boys simply have less to physically cover, probably making inappropriate or accidentally inappropriate images less likely.
http://www.slate.com/blogs/moneybox/2014/06/25/new_york_bans...
http://tinderguyswithtigers.tumblr.com/