Potsie has set up a date for Richie with a girl he knows named Mary-Lou Milligan. Richie is advised to read passages from the racy book “I, THE JURY” by author Mickey Spillane (1918 – 2006) on the date. This is so Richie can show how worldly he is, since Mary-Lou is a ‘girl with a reputation’.
(Episode One – All the Way)

Richie asks Mary-Lou if she’d like to go to a movie with him that night. Mary-Lou says she can’t since she has to babysit at the Kellys. She invites Richie to drop by the Kelly’s residence to join her. Prior to the date, Richie receives advice from Potsie about particular ‘moves’ he should try while he is alone with Mary-Lou.

At the Kellys, Mary-Lou and Richie sit together on a couch. Richie reads some passages from the book I, THE JURY. After a period of awkward conversation, Mary-Lou ends nervous Richie’s anxiety by turning to him and asking, “Do you want to neck?”.

Mary-Lou tells Richie he kisses funny. Richie suggests they do something else. They find a chessboard and begin playing.

The next day all of Richie’s friends want to know ‘how far he got’ with Mary-Lou. While not exactly lying, Richie doesn’t correct his friends when they falsely come to believe he went far beyond the kissing stage with Mary-Lou.

Bothered by the deception, Richie later consults his father about what to do. Howard advises Richie he will feel better if he comes clean about what really happened on the date.

Richie corrects the false assumptions to his friends, including Fonzie, about his date with Mary-Lou. He learns from Mary-Lou that of all her dates, he is the only person who’s been totally honest. Her ‘reputation’, she says, has only been created by guys wanting to big-note to their friends with embellished tales about what went on.

The scene where Fonzie approaches the bathroom mirror to comb his hair but decides it’s perfect the way it is (at the two minute mark in the video), was created partly by way of improvisation on the part of actor Henry Winkler.

As it was originally written, Fonzie was meant to look into the mirror, pull his comb from his back pocket, and begin some ‘adjustment grooming’. Henry Winkler believed Fonzie’s ‘Mr Cool’ character would regard what he viewed in the mirror as perfect the way it was.

This ‘nothing needs improving’ walk-away from the mirror became one of the Fonze’s signature moves throughout the series.