Bob Cummings (offensive in nearly every movie I've seen him in) acquits himself quite nicely here as nerdy professor studying the mating habits of today's teenagers, eventually finding himself sort-of attracted to busty-but-innocent Annette Funicello. Frankie Avalon and Annette get co-starring parts here, later carrying the torch onward to many other beach sequels; they fight a lot (as usual) and try to make each other jealous. The only thing that really separates this initial sand-&-sex romp from the others is a bit more attention to plot and dialogue, less silliness (it's surprisingly low-keyed). Annette, her hair tinted a pretty cinnamon-brown, sings a great solo number, "Treat Him Nicely"--actually, it's her mirrored reflection who gives the advice. A pleasant, colorful outing, with Harvey Lembeck very funny as Eric Von Zipper, who gets "the finger" from Cummings ("You stupids!"). A little singing, a little loving, lots of arguing, and a pie fight finale. **1/2 from ****