Futurama Season 7 Episode 4 (07/08/10)
When Amy keeps flirting bad boys, Kif dumps Amy and she soon finds herself in the abusive hands of Bender, however, their love is forbidden. They try to keep their relationship a secret, but while on a mission to capture tornados, their love is revealed to the crew. Bender wants to marry Amy and comes out as a spokesman to legalize robosexual marriage, against the chief oppononent... the Professor.
During a heated, televised debate, it's revealed the Professor once loved a robot that left him for another robot and he caves in on his side and proposition infinity passes. Now Bender and Amy can finally have their monogamous marriage. Wait... no one said anything about monogamy. Bender ditches Amy and she finds her way back into a now bad boy Kif's arms.