[Connor settles in easily next to him, resting his hands on the surface of the table and lacing his fingers together in a casual way. One pointer finger taps gently at the top of his hand, however, never quite able to still them completely.]

The only liquid that I can "drink" without issue is Thirium. It's the same chemical compound that exists in me now, acting as my blood — or so to speak. If I drank coffee, it would only be detrimental to my biocomponents. Think of it like pouring something similar into the gas tank of a car. I wasn’t created to digest it properly.

[It seems like Connor will facilitate the conversation down any road Prompto takes it, as he knows this is all mere preamble before they delve into the crux of the matter.]

It certainly wouldn't have the same effect on me as it does on you.