...Tanidio is going to snatch the ointment out of Bun's hand and finish applying it himself. 

That is fair enough.

He is-- going to go over there. And do something that looks productive.

He is going to... wipe himself off and put on new clothes and go be a glorified laundry wizard and not talk to Bun unless spoken to, how about that. 

That is an incredibly reasonable choice. Gives him time to work out what he's going to say, because he definitely needs to say something, but he also doesn't want Tanidio to melt into the floor in a pile of embarassment. (He has scripts for 'patient has just experienced an embarassing thing.' He does not have a script for 'patient you have been having casual sex with has embarassingly sexual response to routine medical care.' Medical training does not cover that one, for understandable reasons.)

He is... Going to go prepare a few days worth of sulfur ointment ahead of time. Yes, that's a good idea.

After he's done laundry wizarding, he goes to the lab. 

"Well, you look absolutely miserable."

Murderous glare.

"I know what an alembic is now!"

"Don't street kids have to be good at reading people so they know when they're going to be cuffed across the face?"

"Would Dr. Bun want to know that you threatened to hit me?"

Even more murderous glare.

Cheerfully: "it's important to stay in character!"

He silently heats chemicals up with prestidigitation. 

And Levrolurment is going to continue to explain alchemy to his eager pupil. 

Okay, Tanidio has probably gone to tend his wounded pride. He probably isn't going to go into the lab.

And it would be good to get started on trying to grow bacteria, or making ether without burning his eyebrows off.

... So it turns out he made the wrong call. He is just-- going to be over there, trying to get bacteria onto the agar plates. (Unfortunately, due to having to bootstrap microbiology from the beginning, his best option here is to grow the random bacteria from his mouth. ... Maybe he could also get a sample of staph A from Imelda.)

"...ohhhh, I see."

"What is it?"

"Human mating drama."

Imelda makes an "EWWWWWWW" face. 

"You're going to go through puberty and then you're going to be just as bad."

Imelda shakes her head. "I am NEVER going to want to kiss boys. Or girls."

"That still gives you a lot of options among both elves and gnomes, you know."

Stir stir stir contemplate murder stir. 

Thank you Levrolurment. Your insight is as helpful as always.

"It's nothing you need to worry about, he says to Imelda. "Do you mind if I grab a sample of your scabs?"

"Is it going to hurt?"