The Love Lesson is the seventeenth episode of Season 4 of Three's Company, and the 70th overall episode of the series. Written by Mark Tuttle and directed by Dave Powers, it first aired 22 January 1980 on ABC.
Summary[]
When Chrissy happens to mention that Jack has a date with "Miss Beach Volleyball", in front of Furley, Jack covers by saying he has a date to play volleyball with the guys at the beach. Later, Furley arrives at the kids' apartment just in time to see Jack kissing his date. Jack insinuates that his date is a man in ladies' clothing who is an old Navy buddy. Furley can't believe his eyes and insults the date, who leaves. Furley then encourages Jack to "go all the way and see a real woman" and he will give Jack "lessons" which amuses Larry.
Jack agrees, not realizing that, once he changes to women, Furley will ask him to move out. Jack learns Furley's "lesson" and Furley tells him he must move. Larry meets Jack's date Bobbi Jo Trilling at The Regal Beagle and tells her that Furley is Jack's alcoholic father and asks her to give Jack another chance. She does and Furley, thinking that Bobbi is a transvestite, catches them again and gives up on "changing" Jack. When the real Navy buddy shows up in uniform, Furley tells him he makes a better-looking woman!