Sounds kind of silly but I was in a shop in the UK and I was trying on a dress shirt with tie. I put the shirt on, flipped the collar up in the air and started buttoning the top button. No! The sales person replied, keep the collar down and button all the button except the top, then do the top last and flip up and put the tie on. I am sure he had a reason for this as I have been wearing shirts like this for 20 years and maybe it was just poor habit? Should I change my ways of putting a dress shirt on?