Dear People Photographing Themselves in the Bathroom, Shirtless, with a Cell Phone,
You're doing life wrong. If someone wanted to see you in a pic without your shirt on, someone would have volunteered to take the picture. But no one did. That's why you're taking it of yourself... in a bathroom mirror. Instead of using the phone as a camera, you should take it and call a friend who can talk you out of it, the conversation will sound something like this --
"I've got the camera phone... and I'm kind of naked..."
"Put it down, slowly."
"But I feel so vulnerable right now... no one even comments on my profile pictures..."
"Please, we love you, we don't want you to do this to yourself. This affects the people around you. Also, the lighting is never good in these shots and they aren't particularly flattering, especially if the phone has a flash and here's that random bright white spot in the middle. And it's even worse when people don't Windex their mirrors properly and then sometimes we can see the spots, so just don't do it, okay?"
When you're ready to be photographed, someone will find you.