The 12 most popular superstitions at the game of craps are adhered to or believed by most craps players -- so if you want to play the game and not be thought a craps barbarian, you should know them. Keep in mind that individuals add their own superstitions too, so you might hear someone yelling some incoherent thing at the table which, to him, will ward off the coming of the ominous 7, or bring it on if he is a darkside player.
A man who has never shot the dice before will have a bad roll.
It's like the first time with sex: Most men just don't know what they are doing and the "roll" ends pretty quickly. Neither the virgin principle nor the testes tanking has any validity but like our primitive forebears knew, the world is a superstitious place when it comes to men and women. Pure was good for women; experienced was good for men.