How bad is it? Dated, slightly offensive and completely unneeded.
Should you see it? Sure. It's availability comes and goes. See the 13 minute version.
Dwain Esper directed some classic trash films, four of which I've already reviewed (one accidentally twice). Upon the Hays Code that tried to tame Hollywood, Esper started making "educational" films, which allowed him to break from the code. This film has very brief nudity - censored in some prints, which is why it exists. It starts with a rambling written intro and is bookended with footage of a Peeping Tom. John Barrymore's last wife, Elaine Barrie, is shown as the alluring example of the "correct" way to alluringly disrobe and comedian Trixie Friganza (who specialized in humor making fun of her looks) groans and scratches her way through undressing while the narrator makes fat jokes and ugly jokes. There's a number of versions of this floating around, including a 1950's one with added later footage.