Classic sex comedy starring Jayne Mansfield. Sandy Brooks (Mansfield) wants to have a baby, but her overworked husband, Jeff (Tommy Noonan), seems to always be too tired or stressed for sex. In a bid to help Jeff relax, the couple book a pleasure cruise. If anything, however, they end up having too much pleasure. On the cruise they meet another couple, Claire (Marie McDonald) and King (Mickey Hargitay), and end up exchanging partners. When Sandy and Claire discover they are both pregnant, they set out to desperately try and discover whether the father of the child is their own partner.