It's a completely irrational thing to be prickled up by the offer. Tonic isn't some biochemist looking to make a name for himself with some new discovery, he is a coworker and against all odds ... a friend as well.

Nick can ask for help, and Tonic will give it. It's a strange thing after a life with only one person who you could rely on, and then just yourself after their passing. He smiles, just a little, this one with feeling as small and shy as it is.

"Right, I know my heart is a little farther to the right and down from where a human heart is -" closer to where the In'æt crystals are than where humans keep their hearts "- I'd hate to get shot and have the doctor not know what's an actual lethal wound or not."