Jackson Transfer
Similar to the Monroe Transfer in that it involves the transfer of a waste product from the producer to a willing participant. Simply put the Jackson Transfer is when two people stick a tube in their urethras and one of them urinates into the tube passing the urine to the other's urethra. More of a theoretical proposition.
Few people are aware that Andrew Jackson first theorized the Jackson Transfer in his book I Like Getting Urinated On, by Andrew Jackson, co-authored by John Addams.