Sperm?

“Because they have a head and a tail!”

You practically shouted the answer, gleeful that the one time you paid attention in anatomy class is paying off. As Becky’s grin stays on her face, yours begin to slowly fall off. You look to Agatha who is holding her face in her hands.

“They have a mid-section connecting the two. Come on John! The answer was a coin!”

“That’s right. And since the answer is a coin, I’ll flip one and decide who gets to wear my favorite pair of vibrating panties!”

Becky is almost hopping as she fetches a quarter from the register and casually flips it in the air. It seemingly takes forever to fall back in her hand before she hands the panties to...