Grampa vs. Sexual Inadequacy/References

Trivia

 * Homer is shown shaving off his stubble, which grows back moments later.
 * When Homer leaves to 'do some serious thinking' he drives away from the house in the orange station wagon (Marge's car), but arrives at the farmhouse in his pink sedan.
 * When Homer and Marge are in the car, between scenes, the windscreen goes missing. It becomes noticeable when the mirror appears and disappears, and Abe's head manages to pop out when he and Homer argue over the getaway music.

Cultural references

 * Homer accidentally grabs a nutty photography book by Robert Mapplethorpe at the bookstore.
 * Lisa references Occam's Razor, a real 14th century theory.
 * Milhouse's line "We're through the looking-glass here, people" is from Oliver Stone's movie JFK.
 * Prof. Frink transforming into a suave man with a deep voice is a reference to Jerry Lewis transforming into Buddy Love in The Nutty Professor.
 * Abe Simpson is mostly seen dressed as a quintessential Southern Colonel, an image most associated with Colonel Sanders, the founder of Kentucky Fried Chicken.