The following is part of a scene which I'm planning to put into Aikan Muyo 
Chapter#11. It builds on Washuu's "love is chemistry, sex is physics, 
kinkyness is engineering" comment in Chapter#8. It's been quite a few 
years since I took chem class, so I'd appreciate it it someone who's more 
competent in the subject would take a look at this and tell me if I'm 
having Washuu commit any significant scientific errors in her metaphor. I 
do *not* want to make the universe's greatest genius sound like an idiot.

...

Suddenly, chairs and desks appeared out the lab floor directly underneath
Tenchi, Ryoko, and Aeka, forcing them to take a seat or be knocked aside.
They sat. Washuu walked in front of them, dressed in a professor's robes,
and tapped a podium that had appeared in the same manner as the desks.

"We will begin by studying the relationship which you three are in, a
grouping which chemists call a 'covalent bond,'" began Washuu.

Ryoko smirked. "Aeka's the one who's into bondage, not *me*."

A large ceramic cat statue landed on Ryoko's head with a loud "clang!"

"Owwwww!"

"Raise your hand for permission to speak," admonished Washuu. "As I was
saying, a covalent bond is when two atoms are held together by sharing 
electrons."

Aeka raised her hand.

"Yes, Aeka-san?" said Washuu, nodding.

"Do you mean, when one atom shares an electron which belongs to it with
another atom which doesn't have one?"

"No..." replied Washuu.

A large salt shaker landed on Aeka's head.

"Owwww...!"

"...that's *ionic* bonding. The subject of the class today is *covalent*
bonding." 

A large viewscreen appeared behind her, showing two atoms with 
swarming electron clouds around them. Strangely enough, the nuclei looked a
lot like Ryoko and Aeka's faces. In addition, one of the electrons looked
like Tenchi. It looped alternately around the Aeka nucleus, then the Ryoko
nucleus, back and forth. Washuu cleared her throat, then raised her pointer
and tapped the Tenchi electron. 

"Quantum theory tells us that a valence electron in a covalent bond 
will interact with both nuclei equally, and the overlap of the atoms'
orbitals makes it impossible to determine which atom the electron belongs
to. In fact, it would be more accurate to say that the electron belongs to
*both* atoms. Understand this so far?"

Tenchi, Aeka, and Ryoko nodded.

"The formation of a covalent bond is often a violent event, involving the
release of large amounts of energy." The screen filled with an image of 
the Hindenberg crashing to the ground in flames. "Here we see the formation
of bonds between hydrogen and oxygen atoms."

"Ouch," winced Tenchi, under his breath.

"Once the bond is formed, the atoms become a stable molecule, and they
strongly resist being broken apart..."

Ryoko and Aeka glanced at each other, their expressions very skeptical.

"...but a covalent bond will not form between atoms which just share *one* 
electron."

Aeka, Tenchi, and Ryoko blinked, looked at each other, then glared at
Washuu. "NO WAY!!!" they shouted simultaneously.

Washuu rapped each of them over the knuckles with her pointer. "Raise your
hands before speaking!" she reminded them.

Then she sighed and took off her cap, placing it on the podium. She 
walked behind Ryoko and Aeka and put her hands on their shoulders. "All I'm
saying is that you two need to have something in common besides Tenchi,"
Washuu said gently. "Understand?"


Hassheen!