The Forbidden Dragon

Considered the toughest position in the Kama-Sutra-of-the-Dragon, to perform The Forbidden Dragon, your partner must be in the doggy style position, with back arched downward. You take a vape and press the mouthpiece to your partner's butthole, then press and hold the button. Your partner continuously exhales until vapor is visible, then they roar, becoming 'The Forbidden Dragon'.

Friend 1: "Hey, where have you been? Do you still have my vape?"
Friend 2: "Oh yeah, sorry, I had to clean it. Erin and I had to use it to complete 'The Forbidden Dragon'. It was pretty crazy."
Friend 1: "...You what?"