A guy walks into a sperm donor bank wearing a ski mask and holding a gun. He goes up to the nurse and demands her to open the sperm bank vault. She says: ‘But sir, its just a sperm bank!’ ‘I don’t care, open it now!’ he orders. So she opens the door to the vault and inside are all the sperm samples. The guy says: ‘Take one of those sperm samples and drink it!’ She looks at him: ‘BUT, they are sperm samples?’ ‘DO IT!’ So the nurse sucks it back. ‘That one there, drink that one as well’, so the nurse drinks that one as well. Finally, after 4 samples the man takes off his ski mask and says: ‘See honey - its not that hard.’