There’s an adorable moment when Woodstock makes a nest out of dental floss in It’s Dental Flossophy, Charlie Brown, but otherwise it’s a hard going five and a half minutes.
Charlie Brown needs to floss and Lucy’s going to teach him. She wants to get all that plaque out before she goes to Schroeder’s concert. There’s so much pointless exposition, all of it with wooden delivery, one has to wonder how much work writer Charles M. Schulz put into Flossophy. Or how much work the directors put in to Michelle Muller’s performance as Lucy. It’s impossible to believe some of her deliveries weren’t just first takes.
Woodstuck gets Lucy’s dental floss because he’s having trouble building a nest. It’s a twenty or thirty second subplot and about the only charm in the cartoon. Snoopy helps him with it, apparently able to maintain brain function through Lucy’s flossing instruction instead of just shutting it off entirely.
And it’s all on Muller. Schulz gives her all the lines. She’s got to precisely describe various flossing techniques and there’s no way to make them work in dialogue. It gets her some sympathy, even if her performance itself doesn’t deserve it. When she gets to the “smell your floss, isn’t it gross, that smell is the plaque” moment, the goodwill’s gone. It’s unclear if the plaque smelling is supposed to be funny, disgusting, or instructional; regardless, like the rest of Flossophy, it’s a fail.