Experiment tricked men into believing their dicks are small relative to average. Men told average erect penis is 18cm rated sports cars higher. Effect strongest in men over 30. Men under 30 showed no difference. Bayesian model claims 91% model predictive evidence for main effect. Age strongly boosted ratings in large-average group but not small group. Probability of direction 85% for small penis condition. Interaction age-small penis at 94.3% POD. Age effect 99.7% POD. Averages unrealistic at 18cm or 10cm. Actual manipulation used 18.03cm vs 12.04cm. Independent t-test finds no sports car preference difference (p=0.26). No significant interaction effect. Results hold null even adjusted for product ratings. More believable means like 11cm-16cm might work better. Hypothesis hidden among filler questions.