Mrs. Claus (very Abbreviated Version)

Santa stopped home for a potty break during his X-mas eve present deliveries to find his wife upstairs in bed with Franz Liszt having unprotected sex. Seated in two arm chairs waiting their turn were Antonin Dvorak and Gustav Mahler:

"WTF is going on here ?!?!" "I'm making a Liszt, and Czeching it twice !!!"