Leonard Snart never thought he would end up helping his nemesis.

Or falling for him.

Yet here he was.

And he couldn't keep his hands off.

And everyone noticed.

...

"Barry! Snart!" Cisco moaned. He had learned to usually knock when entering a closest, but he had forgotten, and was paying the price.

Barry and Snart ignored him as they kissed passionately, and Cisco tried desperately not to look down.

Cisco closed the closest with a sigh. 

They were always up to stuff like that. They didn't have time to do it at home, so their compromise was do it at STAR Labs.

Which everyone hated.

When the walked out, Barry's hair was messy and Snart's parka was unbuttoned. 

"Can't you keep your hands off each other?" Cisco asked desperately. 

Barry looked like he was actually taking this in to process.

"Bet you can't," Barry said, facing Snart. "Oh yeah?" Snart challenged. "Bet you can't."

"Then it's a bet," Barry said, and they shook on it.

Cisco just rolled his eyes. There was no way this would last.

...

Barry was at STAR Labs, and everyone except Len had left.

He was typing something on the computer when Len walked over. He looked at the computer.

"Are you sure you don't want to leave early and do it in the car?" he whispered in Barry's ear, and Barry felt his blood rush south at the voice he was using.

"I can't, Len," Barry said without looking up. 

Then Len kicked it up a notch.

He pulled Barry's chair out from under the desk, and sat on his lab. Barry tried to keep typing, but he quickly found Len was distracting him.

"Len!" he whined, trying to shove his boyfriend off, but Len wouldn't budge.

Then he started to play dirty.

"Are you sure you don't want this hot, ready body against yours?" Len whispered, and Barry couldn't help the shudder that passed through him.

"St-stop," he muttered weakly. Len just pressed himself closer.

"Are you sure you don't want to feel my body on yours, here me beg as you ride me?" Len whispered, and Barry's shudder turned into full-on vibrating, making Len moan.

Len shifted, and Barry could hear a soft crinkling. 

It only made him vibrate faster.

"Barry... Barry!" Len shouted, and Barry realized he couldn't stop vibrating if he wanted to.

...

One thing lead to another, and Barry ended up falling asleep on Len when they were done.

...

Team Flash found them that way (Thankfully, before paling out, they had put on clothes) the next morning.