When I was a teen, the greatest shame for a high school girl was to get pregnant. The girl would leave school and sometimes town with the quiet swiftness of an alien abduction. The boy who fathered the child, however, never had to go anywhere and seldom missed a game if he was on a varsity team. I'm sure he was often as frightened as she, but the badge of shame was not his to wear or bear.
Fast forward to the modern era, through three decades of title IX and more waves of feminism than you can shake a bra at. The double standard is still very much alive and in play, only it takes a different form today.
When a high school girl gets busted for sexting explicit pictures of herself, the shame is still hers, just like the shame was her grandmother's if she got pregnant. It's still the girl's reputation that is ruined.
If her boyfriend or a guy she was trying to impress sexts her a picture of himself with his pants down, does anyone much care? Perhaps they care if the boy turns out to be well endowed. In that case, his reputation might actually get better. But for the girl--we talk about her life being ruined. We shake our heads regarding the travesty of it all and say, "Her future employers are going to see this." Or what about, "Digital images are forever--what will her children say?"