A physicist goes into an ice cream parlour and orders a sundae for himself and one for the stool sitting next to him, this goes on for a while until the owner actually asks the physicist what he’s doing.
“I’m a physicist and quantum mechanics teaches us that its possible for the matter above this stool to spontaneously turn into a beautiful woman who will accept the ice cream offer and fall in love with me”
The owner says “Lots of beautiful women come in here every day, why don’t you buy an ice cream for one of them and they might fall in love with you?”
The physicist responds “Yeah, but what are the odds of that happening?”