aka The Countess Died of Laughter, aka Devils in the Convent, aka Knickers Ahoy
How bad is it? Sex comedy with few laughs and a lot of padding.
Should you see it? Not really.
This was the last (sixth?) of a series of German-language films based on a bawdy song and filmed with a largely Italian cast. It's sort of in the "Carry On" tradition of silly comedy with a lot of nudity, in this case a lot of bare bottoms (which is at least a change from breast-obsessed comedies, I guess). A courtesan dies - ridiculously - and her heir is a girl in a convent. A man goes to the convent to find out which of five girls is the heir and all five are apparently nymphomaniacs. The film is heavily padded with footage from the earlier films, which appear to have been higher in budget.