The Sociology professor was explaining how society's ideals of beauty change with time.

"For example," he said, "take the 1921 Miss America. She stood five foot, one inch tall, weighed 108 pounds and had measurements of 30-25-32. How do you think she'd do in today's version of the contest?"

One student piped up, "Not very well."

"Why is that?" asked the professor.

"For one thing, she'd be way too old!"