Goof: In the second-to-last scene, when Bess is talking to Mary but facing the camera, a crew member's shadow passes very visibly over the armchair on which Bess is leaning.
Mary's apartment is slightly altered in appearance from the previous season. In addition to minor changes in furniture, there is an extra set of carpeted steps in the middle of the low shelves that separate the upper level from the sunken living room.
A new version of "Love is All Around" debuts with this episode and will be used for the remainder of the series' run.
According to this episode, Bess is in the 8th grade and has a boyfriend.
Gordy: (fielding the stream of obscene phone calls for Mary) Yes, this is Miss Richards speaking...uh-huh...uh-huh...(other phone rings) Hey look, man. I got another obscene caller. Let me call you back.
(phone rings in Mary's apartment) Phyllis: I'll get it. Hello? (to Mary) You're right. It is an obscene phone call. (hands her the receiver) It's Rhoda.
Rhoda: (talking to Mary and Phyllis about a talk show she saw) They had on the woman who wrote The Sensuous Woman, and the man who wrote The Sensuous Man. Unfortunately, I never did get to see the end of the show. They both left together during a commercial break!
Rhoda: How d'ya like that? I flunked a sexual IQ test and passed a national driver's test...and Mary, I'm a lousy driver!
Lou: (grinning widely) I got an 88!
Mary: T-t-that's a good score.
Lou: I would have got a hundred, 'cept I wear a flannel nightshirt!
Mary: (rather uneasily) T-that, umm, was the, ah, trick question.
Rhoda: Howdy! Everyone got their 'birds and bees' sweatshirts on today?!
This episode was filmed on June 11, 1971.
Ted says he read the book God's Little Acre when he tells Murray how he first learned about sex. God's Little Acre is a 1933 novel by Erskine Caldwell which was so controversial at that time that a literary board in New York attempted to censor it, leading to the author's arrest and being tried for obscenity.