Peak speci-men.

Two-factor theory of emotion.

They found that the men who walked across the scary bridge were more likely to call the woman to follow up on the study, and that their stories had more sexual content. The two-factor theory would say that this is because they had transferred (misattributed) their arousal from fear or anxiety on the suspension bridge to higher levels of sexual feeling towards the female experimenter.

Relevant (and via): List of cognitive biases.