Rating: 14/20
Plot: Dr. Rogers from the Bureau of Sexological Investigation roams about in the Sexmobile and interviews experts in sexual matters, talks to everyday people on the streets, and visits key sites to answer the titular question and others.
Prankster Alan Abel and his wife created this now-dated look at sexuality. It's funny forty-some years later, but after a while, it gets a little tedious. There are plenty of naked people, but if this makes any points at all, it makes them early. The wad is shot, so to speak, and then it keeps going. Abel himself plays the roving reporter and does it as a sort-of straight man. It's amazing that he keeps his composure while sitting so close to so many naked people or hearing an actor say, "For the vegetable, it was exquisite," or a "Professor of Dildography" talk about "millions of miles of unused orifice," or an x-rated magician ask, "Is that not your urine sample?" or an expert claiming that "you'd be up to your ass in dwarfs" if one of eight didn't die during sexual intercourse. In between all that, Abel takes us to a sex Olympics, a nudist colony where they sing "Dinah Won't You Blow Your Horn" and later dance in a way that makes nudity seem like a pretty terrible invention, a perverse art gallery, and a pornographic opera. Oh, and there's a brief penis puppet show. Robert Downey Sr. makes a pair of appearances, but he's nowhere as entertaining as Earle Doud who plays the x-rated magician or Marshall Efron who plays Vince Domino, the "master of filth and excretion" who talks about making a pornographic film with a goose and a donkey. This is nothing revolutionary, some bits fall completely flat, and it's not always even all that much fun, but it's an interesting enough little time capsule item nevertheless.
