[At least she didn't sneeze in his face. That also wouldn't have gone well for either of them. It's a good question though. Why didn't he just say so? While she might be bemused, he's sort of berating himself in his head. 'Because I'm an idiot?' The real reason is one he's not sure he's ready to share with her yet, but at the same time maybe that's what all of this means. Maybe this is actually what Yang was talking about.

So. There's a heavy sigh and a shrug as he runs a hand through his hair, successfully scattering more baking soda everywhere. Oops.]

I don't know. You just seemed really excited and happy about it and I didn't want to take it back after I'd already said it. [A beat.] That's kinda one of my favorite things about you. You're just excited about everything and I don't want to be somebody who takes that away.