Friend and US colleague Peter Fleischer is known to occasionally drop a swear-bomb into presentations and conversations - not to shock or offend, but to underscore the importance of a specific point.
Turns out he has psychology on side. At least one study finds that mild swearing can snap audiences into focus and accentuate the passion of the speaker.
Damned if I know how far this can be taken...
Light swearing can be useful even in a relatively formal situation like a lecture.When you show some feeling, the audience notices, credits you with sincerity and is more likely to take your message to heart.