Starring the delectable Jayne Mansfield in her most revealing role, this sexy, shipshape, comedy romp takes place on an ocean bound liner with two couples eager to have children and a comedy of errors in deciding who is the real father! When the ship's doctor (Fritz Feld) gives Jeff (Tommy Noonan) a pill to spice up his sex life with Sandy (Jayne Mansfield) he doesn't mention the side effect that his recent memory will disappear. So when Jeff takes his pill, goes to his wife and then mistakenly spends the night with Claire (Marie McDonald), his best friend's wife in her cabin, Jeff can't remember which woman he has made love to! And when Jeff's strong-man friend King (Mickey Hargitay) gets hot on his wife, who will become pregnant and who will be the father? This is the see Jayne Mansfield in 'all her glory' role that led to her headline-grabbing photo spread in Playboy Magazine.