[He smiles again and glances at her before dropping another feather into the hat. His face has turned just a little bit pink.]

You're welcome.

So, uh... Do you want to pick out the feathers for my hat here, and take my hat back home with you and you can finish it there? Because...

[Because he really doesn't want to run into Eridan again, so he doesn't think it'd be a good idea for him to go back home with her.]