Gary Graver - How to Undress in Front of Your Man (1970)

Synopsis: After an evening out, a skinny hippie chick attempts to get her man in the mood for love. But he’s just too tired. She proceeds to use all her sexiest moves (even showing him her “tunnel of love” and making her “fun zone” more attractive with good hygiene), hoping to awaken the beast. When all else fails, she resorts to stroking his giant cock. This finally gets his attention!