Ironically, this is exactly why I don't trust science
They just make stuff up and say "See? SCIENCE." The world would be a better place if the generally accepted answer to my question, and many others such as how the fuck a tiny stone magically materialises inside your shoe when you have a long way to walk and it's raining, was "Fucking magic, mate. That's just the way it is."

See also; why the sun always goes in when you put sunglasses on, supposedly hilarious monkeys being asleep whenever you swing by their cage and Craig David's popularity in the early 2000's even though no-one bought his records.
(Darth Foxtrot A one-man army dedicated to making fetch happen, Mon 16 Jul 2012, 16:57, Reply)