There are no known exceptions to the old and well known dictum — laughter is the best medicine. Be it high blood pressure, diabetes, strokes, heart disease, or any other stress-related condition, laughter and a healthy sense of humour is the treatment.
The 'homour' in the armed forces is good-natured, it makes fun and may seem disrespectful, but it never is. It may seem abusive, but it is never offensive.
The Indian armed forces have a great sense of humour, as awe-inspiring as its fighting prowess — remarkably incisive and direct (like the famed Bofors), succinct and biting, but for reasons unknown (and perhaps 'clasified'), they prefer to shoot with their weapons, rather than with their writing instruments.