The Love Tester is a love machine seen in Moe's Tavern and appears in a few episodes. Its first appearance was in Flaming Moe's.
In Krusty Gets Kancelled, Krusty has an afterparty at Moe's Tavern and Hugh Hefner is seen trying the love tester. Like many others, his results were not good and gets frustrated from it.
In The Simpsons Spin-Off Showcase, with the section, The Love-Matic Grampa, the machine become haunted by the ghost of Abraham Simpson and has to help a certain barkeep with love.