This inquiry explores the influence of a humorous intervention designed to raise mothers’ intentions to talk to their child about sex (N=442). Mother-adolescent sexual communication has been linked to positive sexual health outcomes for the child, but little is known about how to motivate mothers to engage in this communication. Using the Theory of Planned Behavior, this experiment tests the influence of humor and amusement on attitudes, norms, self-efficacy, and likelihood of future sexual communication. Results disclose that mere exposure to humor can have a negative effect on participants, unless they report being highly amused, in which case their communication attitudes, norms, and intentions are raised. Results are debated in light of implications for grasping the persuasive effect of humor and amusement on future mother-adolescent sexual communication.