Royal Chalice
When a chick claims she can't have sex because she's on her period. So you have her sit on a goblet and proceed to squeeze her tightly around the waist for 5 minutes. At the end of the 5 minutes you raise the cup for toast and drink its contents to prove you are the King of the land and that a little bit of blood don't phase you, so bitch ready to fuck now?
To deny the Royal Chalice is to deny the very spoils of this divine kingdom.