Final answer:
The behavior of the individual sharing personal thoughts on sexual adequacy in a public setting with a stranger is an example of over-disclosure.
Step-by-step explanation:
In the scenario provided, where an individual openly shares their private thoughts on sexual adequacy with a stranger, the behavior exhibited is best categorized as over-disclosure.
Over-disclosure refers to the sharing of personal or intimate information with others who are not typically privy to such details, especially when such sharing defies social norms or the expectations for privacy in a given context. This contrasts with the actor-observer bias, which involves a tendency to attribute the behavior of others to their dispositions while attributing our own behavior to situational circumstances.