boyfriend in lingerie

So I know I'm gunna hear about it as a "no no" but I was going through my boyfriends email on his phone. I stumbled on pictures of him in women's underwear. Like corset and a mini skirt. All with his package hanging out. Even one with it tucked under. More emails consisted of a everyday pictures of him boxing. All things were sent out but nothing returned from the email address he sent it to. My boyfriend is really masculine. So this came as a utter shock to me. What should I think about this?