Joker woke up alone. It wasn't surprising, really, since a quick glance at the clock showed it to be nearly eleven.

Standing, he stretched, groaning as his back cracked in a few places. After making a quick stop to the bathroom, Joker focused on locating Jonathan.

He wasn't surprised to find him in the lab. He was leaning against a wall, checking his formulas. The room was spotless.

"Back to work so soon, Jonny?"

Jonathan marked the paper, small smile rising on his lips.

"Can't let you have all the fun, now can I?"

Joker giggled, crossing the room to try to peer at the notes in Jonathan's hands. He couldn't understand any of it.

"Ya gonna tell me what you're working on?"

"And ruin the surprise?"

Jonathan looked up with a grin. Joker froze at the sight before him. From his upturned lips, revealing a hint of the white teeth underneath, to the mischievous glint in his eyes, Jonathan was truly a sight to behold.

Joker licked his lips, moving closer to place his hands on either side of Jonathan's head as he leaned in.

"But I wanna know now."

"Good things come to those who wait." Jonathan moved to set the paper down, before staring into the Joker's eyes. He swallowed, nervous, but did not move away.

There was a pause before Joker's lips were on his, insistent. He opened his mouth to allow the prodding tongue entrance. When the other man's hands roamed downwards, however, he pulled away.

"Volatile chemicals that will explode unless properly maintained are surrounding us."

"So?" Joker nuzzled his neck. "You'll just have to keep an eye open."

Jonathan opened his mouth, but closed it without a word. He took a breath, blushing as he opened his mouth again.

"While not…completely impossible, it's unlikely that I will be able to remember the proper way to maintain all of the chemicals I'm working with while….distracted. Speaking of…" Moving away from Joker, Jonathan crossed the room to turn down the flame of a burner, stopping a chemical reaction from becoming violent. Joker pouted, stepping behind his husband and embracing him from behind.

"Just shut them all off. You can turn them back on when we're done."

"Maintaining chemicals is more than just applying heat. Certain mixtures require a specific amount of consistent heat for a span of time. If the time is altered, the desired reaction will not happen. Turning the chemicals off and putting them back on later, no matter how brief the time span, will not have the same effect, and the mixture will be ruined. Furthermore--"

Joker silenced him with another kiss.

"I get it, I get it. But we will be continuing this later. And there will be nothing 'brief' about it."