Moe Letter Blues
Season 21 episode 21
Summary: Homer, Reverend Lovejoy, and Apu get a letter from Moe saying he will steal one of their wives. They spend the episode looking back at intimate moments between Moe and their wives.
Helen Lovejoy: Is that a train in your pocket or are you just happy to see me?
Reverend Lovejoy: Both.
Haha love that episode!