The location reserved for listeners who are suffering after the failure of a significant relationship.
Anecdotally, Wittertainment has been used on the rebound by more than one listener following a breakup. When such letters are read out you may hear Mark humming the Love Theme from Romeo And Juliet (because it was used by Radio 1's thematically-similar Our Tune, presented by Simon Bates), and may end in the use of the Fart Gun aimed at the dumper of the letter-writing dumpee.
Tips have been sought for films that don't "Bang on and on about love all the time".
Mark also recommends Independence Day by the Comsat Angels as the best breakup song ev's.