Everybody has moments of stupidity - or "blonde moments" - so what is something stupid you've done or said.
I'll start - my sister and her family were here visiting me a couple of months ago. My sister was going to give my neice a bath and she asked me if I had any shampoo. I said of course and told her it was in her hand. She said no, this is conditioner. Turns out I was using conditioner to "shampoo" my hair for about three months.