He knows that humans have a beat that can change in tempo and rhythm. Androids didn't get that change, their software and hardware working in tandem to keep the heart part on it's steady metronome. Despite how much any android wanted to be a human, there were things about them that would always keep them apart from being an organic being like a human.

York finally snaps his hand away from her easy grip. "Where you're not going to look," he tells her bluntly, glaring at her. Like it was offensive that she even ask. "You didn't answer my fucking question. The fuck did you mean by there's something wrong with me?"

The android straightens up, like he's trying to be bigger than his short stature is - a learned behavior from other humans it seems.