On the first day of college, the dean addressed the students, pointing out some of the rules:

"The female dormitory will be out-of-bounds for all male students, and the male dormitory to the female students," he explained. "Anybody caught breaking this rule will be fined $20 the first time."

He continued: "Anybody caught breaking this rule the second time will be fined $60. Being caught a third time will cost you a fine of $180. Are there any questions?"

At this point, a male student in the crowd inquired: "How much for a season pass?"