How to Stuff a Wild Bikini is considered to be the strangest of the "Beach Party" movies. Frankie (Frankie Avalon) is off in the navy, serving in the South Pacific, and nervous about all of the guys that will be hitting on Dee Dee (Annette Funicello) back at the beach. He makes a deal with an eccentric white witch doctor (Buster Keaton), who conjures up a woman named Cassandra (Beverly Adam) who is irresistible to all men, and she attracts all of the guys on the beach. But complications ensue when lunatic advertising man Mickey Rooney decides to try and make Cassandra a new national sex symbol, and she gets noticed by nutsy bike gang leader Erik Von Zipper (Harvey Lembeck), who vows to have her. With enough plot complications to rival A Midsummer Night's Dream, Wild Bikini is laced with satire and some surprisingly good music.
~ Bruce Eder, All Movie Guide