Double headed dragon

A three-some where: person #1 is performing oral on person #2 while having sex with person number #3 , while the #3 is licking the rectum of person #2 simultaneously with #1 doing oral.

Person #2 talking to his brother: man, Sidney and Oliver played me like a double headed dragon last night!

Brother: oh yeah?!

Person #2: yeah man, my bed was a literal slip and slide and my knees didn't work for hours after!