"Captain and the Red Shirt" joke

In the days where tall, wooden ships sailed the high seas, there was this one ship
sailing during a war. That morning, the lookout shouted, "enemy ship on the horizon."
The captain said to hisensign, "Get me my red shirt." The ensign, rather bewildered
from this odd request, did as his captain ordered. Thought the battle was a long one,
the captain and his crew managed to fend off the enemy ship.
Later that day, the lookout shouted, "two enemy ships on the horizon." As before,
the captain said to his ensign, "Get me my red shirt." And, as before, the ensign
did as his captain asked. The battle took the rest of the day to fight, and managed
to defeat the two enemy ships.
That evening, the ensign asked his captain, "Sir, Why, before every battle, do you
ask for your red shirt." The captain replied, "Well, if I am wounded in battle, the
blood will not show and the crew will continue to fight." The crew was listening,
and they were impressed. They had a brave captain.
The next morning, the lookout shouted, "Ten enemy ships on the horizon." The
ensign looked at his captain, waiting for the usual orders. The captain said to
his ensign, "Ensign, get me my brown pants."