Tony Stark is twenty-one when he loses his voice. It shouldn't matter, but in a world where the first words your Soulmate says to you are marked on your skin, it can be pretty damn annoying.

"Why don’t you ever let me see it? If you have the name already, why can’t you tell me whose it is? I thought we were best friends." Everyone gets their Name when they turn twenty-one. It isn’t their own name either. It’s the name of their Soulmate. When Wade Wilson wakes on his twenty-first birthday, he looks down at his chest and sees Peter Benjamin Parker. He stares for a moment then shrugs, gets dressed, and doesn’t think about it for another six weeks.