People ask 'do you make a conscious effort not to swear?' - if you're doing silly stuff you're not tempted to put swearing in. All the comics from my childhood who were funny without swearing were the people that influenced me. What I do is quite traditional anyway.
But I spent just two calendar years at Cornell University though it was covering more than three years of work and then went to medical school and did become interested in psychiatry and even helped form a kind of psychiatry club in medical school.