I don’t know about you, but it drives me nuts when online forms ask me to type my email address twice. Hello! I can see whether I typed it correctly the first time, thank you very much. It’s not like a password field, where your input shows up as asterisks, and there’s no way to see if you typed it correctly or not. So, I can understand asking the user to confirm their password (though only on password creation, of course). But please, if you are ever in the position of designing a form that asks the user for their email address, don’t make them enter it twice! Or I’ll have to hunt you down and beat you with a wet noodle, as my mom would say.