It was a cold, rainy day. The team had been called out to a small town in Wisconsin to investigate a series of murders that included rapes. Hotch and Reid were assigned to the scene of the latest crime. An area in the town's park had been cut off from the public with yellow crime scene tape. Reid slipped under the tape and approached the body of the victim.

"I've never seen anything like this before," he gasped.

There, lying spread-eagle on the ground, the corpse of a woman was nude and exposed.

"You've never seen a choke victim before?" Hotch commented as he examined the purple finger marks on the victim's neck.

"No, not that." Reid shook his head. "I mean, I've never seen breasts quite like that before. Seriously, it looks like they're reaching out to grab me!"

"Reid," Hotch began patiently. "Those aren't breasts. Those are the victim's genitals."

Reid blushed in response. Hotch was fairly certain Reid had taken a human biology course somewhere along the line of his extensive education, but just in case, and because it had failed to make any lasting impact on the young man, Hotch made a mental note to correct the situation and bring his agent up to speed as soon as possible.

Reid may have taken a human biology course, but the female body looked different in real life than it did in textbooks. Who would have guessed that certain parts were not actually highlighted and labeled? Actually, now that Reid looked closer, it appeared that the body had been marked in certain places with pink highlighter.

"Hey, Hotch, check this out. The unsub appears to be either female or gay."

"No, Reid," Hotch's patience was beginning to wear thin. "I was just preparing the body for your anatomy lesson. And I happen to have a penchant for pink!"

"Oh," Reid grinned sheepishly.

Hotch pointed to a highlighted part of the victim's body. "Now, tell me what part of the body that is."

"The belly button," Reid replied confidently. "Next."

"Very close," Hotch reassured. "You said it unintentionally."

"Ooooh!" Reid exclaimed. "It's the anus! I saw one of those the other day, back at the office!"

"Yes," Hotch said, trying not to grimace. "Morgan was teaching you physics."

"Yes," Reid confirmed. "It's amazing how diverse subjects intertwine. Not only where we doing physics, but it was human biology, too. And it was geometry. There's a certain angle Morgan showed me-"

Hotch cleared his throat. "Thank you, Reid. That's enough."

As if on cue, Morgan, covered in dark chocolate syrup, walked onto the scene of the crime.

"How's it going guys?" he asked, licking his fingers.

"Superbly," Reid replied. "Hotch was just giving me a lesson in female anatomy."

Morgan stared down at the body. "That's weird. Why would you use a woman who underwent a sex change?"

"Oh! No wonder the genitals look like they're reaching up to grab me."

Hotch looked confused. "I guess I missed it because it's so small."

Reid gawked. "But it's bigger than mine!"