Rickdependence Spray -

Morty uses a horse breeding mount at Beth's workplace for self-gratification. Rick steals the "horse" semen to create a weapon against the CHUDs (Cannibalistic Humanoid Underground Dwellers), but instead creates a sperm army.

The episode follows several escalating, absurd threads that culminate in a national crisis: Rickdependence Spray

While largely a "23-minute sex joke," the episode features several underlying themes and parodies: Morty uses a horse breeding mount at Beth's