Dinner with Malibu

Tommy spies on his father's girlfriends through a peep-hole from his bedroom into the bathroom. One day, his father Richard brings home Malibu, a charming blonde who he says may be the serious thing. When Malibu excuses herself to the bathroom, Tommy plays peeping-tom again... and then has to spend all evening trying to warn his father that the hot chick he brought home... is a man ! - IMDb