This marks the first time that "I Think I Love You" is performed on the show. The song would go on to sell several million copies and as well as go to number-one on the Billboard Hot 100.
When Keith takes his girlfriend, Tina, home, her home is the same house used by Darrin and Samantha Stevens on Bewitched.
When Keith is looking for a plain brown envelope in the mail, the implication is he is expecting that month's issue of Playboy, or similar magazine.