is sex work?

[$parechange]

A U.S. Marine Colonel was about to start the morning
briefing to his staff. While waiting for the coffee machine to finish
its brewing, the colonel decided to pose a question to all assembled. He
explained that his wife had been a bit frisky the night before and he
failed to get his usual amount of sound sleep.
He posed the question of just how much of sex was "work" and how
much of it was "pleasure?" A Major chimed in with 75-25% in favor of
work. A Captain said it was 50-50%. A lieutenant responded with
25-75% in favor of pleasure, depending upon his state of inebriation at
the time.
There being no consensus, the colonel turned to the PFC who was
in charge of making the coffee. What was HIS opinion? Without any
hesitation, the young PFC responded, "Sir, it has to be 100% pleasure."
The colonel was surprised and, as you might guess, asked why?
"Well, sir, if there was any work involved, the officers would have me
doing it for them."
The room fell silent.