I enjoyed the bit about George not getting any sex and suddenly becoming very intelligent. Remember Jerry describing George's brain with the head of lettuce, breaking off a small piece to illustrate that sliver that wasn't devoted to sex--and then casually popping it into his mouth.
And Elaine, getting dumber when she DIDN'T have sex--moving her head as she watched the tire display rotating, and declaring flatly to Jerry, "I'm a moron!" Hilarious
Dave Thomas