[scott_s]

I was suggesting that if you were training to become one, taking cold showers would help you prepare for the shock of BUD/S training.

I sincerely doubt it. The point of BUD/S is that it pushes recruits way, way, way past anyone would push themselves. Constantly getting wet-and-sandy is only one aspect of it, and one 10 minute shower a day is not preparation for being wet and cold for, literally, a week.