I am eternal. From eternity to eternity, both ways.
But anyway, welcome to the Internet - where men are men, women are men, and children are FBI agents (as the saying goes). If your age says 13, how do we know it's not 31, or 67? You can't tell age over the Internet, you have to rely on trust or apathy. You can't tell sex over the Internet - who knows, you might have, whether deliberately or accidentally, say, registered as a girl when you're a guy, or vice versa.
A guy I know came up with a very nice solution to this problem, though. "Unless I've met you in person, I will not believe that you are a man or a woman. Instead, I will choose to believe that you a hyper-intelligent chicken wing."