Tip of the Tongue(1986)
OVERVIEW
After constantly being rejected whenever they get amorous, Peter becomes convinced that his wife Melissa is cheating on him. Turns out, Peter's right, and Melissa arranges for him to catch her and her girlfriends in the act so he can get a few pointers on the fine art of lovemaking.
TAGLINE:
Keep Your Lover Happy, Eat Out More Often.