For reasons which defy understanding, Ricky pretends to be a horse novice in order to secure a date with a pretty riding instructor. He could have just asked her to the hayride. He could have just stood there being the beautiful Ricky Nelson and waited for her to flirt with him. But instead, he did exactly what Ozzie does in every episode. He concocted a tall tale to get her into the saddle and take her for a ride. Except for Harriet, these Nelsons never seem to tell the unvarnished truth as their first response to any situation. And this is supposed to be a paragon of wholesomeness. No wonder they live with their parents until retirement age.
And speaking of aging, there's a scene at the end in which Ozzie and Harriet are in bed together. I'm not sure why the Nelsons were allowed one bed when Rob and Laura Petrie had to have two some years later. Maybe Mary Tyler Moore was just considered more prurient than Harriet. In the scene, David and Ricky show up in their pajamas to say goodnight. They are both strapping, fully-grown men (ages 22 and 18) with obvious chest fur sprouting out of the tops of their PJs. And then they turn around and head off to their bedroom, which they still share. And which still has the same two child-sized beds in which they slept when they were eight and twelve. You don't see their room in this episode, but it shows up in the next one and it hasn't changed. Maybe Ozzie's been lying to them about their age.
This episode is only mildly entertaining, but has two songs by Ricky, which makes it worth watching.