On the first day of college, the Dean addressed the students:

"The female dormitory is out-of-bounds for all male students, and the male dormitory to the female students. Anybody caught breaking this rule will be fined $20 the first time. The second time you will be fined $60. A third time will cost you a fine of $180. Are there any questions?"
A male student inquired, "How much for a season pass?"