Don't tell me what to do

When a cashier says, "Have a great day". I say, "Don't tell me what to do". 

I think it's funny. Most cashiers think it's funny. My wife thinks it's embarrassing :).  

The reason I do it is because it makes people smile.  

Don't be afraid to be a little different if it will brighten up someone else's day. 

Life LessonsDoug Stewart