No no. That's much much worse in my opinion.

I've done that before. Thank god no one noticed

I've had worse, once I accidentally called my female teacher dad...

In 5 minutes I said my dogs name: Mao, to my mum, mum to my dog, grand mum to my dad... And hello to a mental hospital

Oh my goodness. I have a vivid memory of something similar. We were at a toy shop and someone who I thought was my sister was looking at the catdog toys. I shouted out "ooooooh I love catdog!" and went to take the toy from her. Then they looked at me like I was crazy for a second and then just laughed. I looked over to see my family was on the other side of the shop about to leave and motioning toward me to follow. I was mortified.

That has happened to me before!

I still remember doing that to someone when I was really young (probably around 4 yrs old). We were at church and there was a lot of people around and I turned and grabbed onto, what I thought, was my moms leg, only to look up and realize it wasn't her. I was so embarrassed. Weird how that can embarrass us enough that we remember it years later.