How many times have you found yourself holding up the tomato ketchup bottle over your KFC chicken wings, waiting for the liquid to blanket those meat but its taking ages for it to come out.

So you decide to pat the bottle from the back like comforting someone with a bad cough. Still its not coming out.

Now you decided to shake the bottle and you end up splashing more red lipstick on your girlfriend’s face!

Well - that’s because we have been doing it wrong. This is the correct way to do it.

Read the technical explanation on it (getting dumped for splashing ketchup too many times on her prompted him to write this).