A guy walks into a brothel and tells the madam he wants six girls for the evening. The next morning the madam informs the gentleman that there will be no charge. Very happy, he leaves.
A few days later he returns, and again tell the madam that he would like six
girls for the evening. In the morning the madam presents him with a bill for
Confused the man asks, "I don't understand, on Tuesday it was free."
"That's right," replies the madam, "but on Tuesdays we're on cable."