A guy goes to a travel agent and books a two-week cruise for himself and his girlfriend. A coupledays before the cruise, the travel agent calls and says the cruise hasbeen canceled, but he can get them on a three-day cruise instead. Theguy says "OK," and goes to the pharmacy to buy three Dramamine andthree condoms.

Next day, the agent calls back and says he now can book a five-daycruise. The guy says he'll take it. Returns to the same pharmacy andbuys two more Dramamine and two more condoms.

The following day, the travel agent calls again and says he can nowbook an eight-day cruise. Guy says, "OK," and goes back to the pharmacyand asks for three more Dramamine and three more condoms.

Finally, the pharmacist asks, "Look, if it makes you sick, how come you keep doing it?"