He went to the pharmacy and bought a bottle of seasick pills and a tube of lubricant. Upon returning home, his wife said "I've been thinking, there's no reason we can't go for a month."

Mr. Johnson went back to the pharmacy and asked for 12 bottles of seasick pills and a tube of lubricant.
When he returned his wife said, "Since the children are on their own, what's stopping us from cruising the world?"

He went back and bought 200 bottles of seasick pills and more tubes of lubricant.

The pharmacist finally had to ask: "You know, Mr. Johnson, I don't mean to pry, but if it makes you that sick, why the hell do you do it?"