"Okay, students," the gym coach said. "Please line up according to size."
The guys scrambled around unsure of what to do.
"Professor?" the students inquired. "What do you mean by size? There is height, weight and you know..."
"Discuss among yourselves what kind of line you want to form guys," said the professor.
The guys fiddled about, scrambled around and finally formed a line. There were tall guys next to short guys, heavy guys next to thinner guys, a lot of joking around and laughing.
"I see!" said the Professor. "Okay, girls, come on in now."
The girls looked around and wondered what was going on. The guys were all lined up straight across the classroom.
"Welcome to Human Sexuality 101! Today, we will discuss anatomy."
The girls all laughed. What was going on here?
"Men, remember your places. You will need to form this line again soon."
"Women, pick your favorite number from four to ten and form groups according to numbers, please?" asked the professor.
The girls gathered amongst each other. "Well, there are four in my family, so I guess that's my favorite number," said Sara. "I consider myself a number 10, so I'll pick that number," said Joan. "Hmmmmm," said Linda. "I've always liked the number 7 for luck."
"Alright, students," stated the professor. "Girls, line up with your same numbers that you picked. Gentlemen, and you know who you are, join the girls that picked the same number as you."
"But, professor," asked Sara. "The guys didn't pick numbers, did they?"
"They were born with numbers, Sara. You'll understand shortly," stated the professor.