Facepalm

Them: "So, the order confirmation will be sent to you via e-mail. What's your e-mail address?"

Me: "Such and such at hotmail dot com."

Them: "Oh, do you have another account? Many of our clients who use hotmail find that our e-mails go to their junk folder."

Me: "Don't worry about me. I always check my junk."

Them: "..."

Me: "Wait, that came out wrong..."