Joan, a rather well-proportioned though near-sighted secretary,
spent almost all of her vacation sunbathing on the roof of her
hotel. She wore a bathing suit the first few days, but always removed
her glasses for an even facial tan.

After several days she decided that no one could see her way up
there, so she slipped out of her suit for an overall tan. She'd
hardly begun when she heard someone running up the stairs; she was
lying on her stomach, so she just pulled a towel over her bottom.

"Excuse me, miss," said the flustered little assistant manager of
the hotel, out of breath from running up the stairs. "The hotel
doesn't mind your sunbathing on the roof, but we would very much
appreciate your wearing a bathing suit as you have for the past
week."

"What difference does it make?" Joan asked rather calmly. "No one
can see me up here, and besides, I'm covered with a towel."

"Not exactly," said the embarrassed little man. "You're lying on the
dining room skylight!"