Actually my brother-in-law KELLY reminds me of this. He is not the shy one at all. Recently while shopping at Kroger's and getting groceries, he used his Kroger plus card. The clerk commented, because you have use the Kroger plus card, you have saved $5.91. To which, he threw his hands in the air started dancing in a circle and screamed I have won, I have won. I nearly coughed up lung laughing, and my teenage daughter turned all red and embarrassed and wanted to get out of there as quick as she could.

I once had to drive a female roommate to the store for an emergency feminine product (she was a cute little blonde model so I wasn't going to say no - lol).  While she's off getting what she needed, I was bored and grabbed a banana.
 
So, there we are going through the checkout lane with tampons and a banana when I see the checkout clerk looking a bit puzzled at the combination but trying to hide his curiosity.  I pointed to the banana and said "Backup, just in case!"  I thought he was going to lose it completely right there.  He turned beat red and we couldn't stop laughing.

A guy was at the supermarket and after buying a few things he began to queue up in this really long line for the checkout.
After about 15 minutes in the line he reached the checkout girl and just at that moment he remembered that he needed some condoms. Not wanting to line up again he said to the girl "Oh I meant to buy some condoms but forgot"
"Do you know what size you are?" she asked. "No," he replied.
"OK let me have a feel then.."
 
She then put her hand down his trousers has a good feel and then says into the microphone "1 packet of large condoms to aisle 3 please", the condoms are brought to him and he pays his bill and goes on his way. Another male customer sees this and thinks he'd like some of that and so says the same thing to the girl...
 
A similar course of events takes place, only this time after having a feel she says "One packet of medium sized condoms to aisle 3 please", the condoms are then brought to him and he pays the bill and goes on his way. Also watching this course of events was a rather excitable 15 year old boy who then decides to queue up and try the same routine. "I'd like to buy some condoms please, but I forgot" he says.
 
"Do you know what size you are?" she asked. "No," he replied. "OK, I'll just check for you.....
 
 
"Clean up in aisle 3 please!"

Unfortunately, you'd have to substitute "Depends" for "condoms" with most of the crew here... 

But we don't have WalMart here in Norway 

Zargg
But we don't have WalMart here in Norway 

Not enough ugly, fat people for customers?