Microexpressions were very easy for the average person to miss unless they had a recording that they could review multiple times to pinpoint the tiny ticks and unconscious shifts that gave someone's true feelings away before they were able to mask them with conscious behavior. For him, and presumably for Barry as well but likely not as easily, microexpressions were just like regular facial movements. And as his gaze settled on Hartley's, Eobard couldn't help but smile a bit wider. As much as he might be trying to hold himself neutral, Hartley had never been as emotionally devoid as he would have liked people to think. In fact, if anything, he'd been the most emotional out of all of his inner circle at Star Labs. Caitlin, Ronnie, Cisco. They each had their own needs, quirks, and desires that he'd satisfied for each of them, but at the end of it, none of them were quite as desperate for affection as Hartley had been.
"I can only imagine the sort of position you might have seen me in last," Eobard said, grinning a bit before glancing down at himself. "Unless you're referring to the lack of the chair. But we both already knew that was a lie, didn't we? Come in, Hartley. It's not productive for us to linger in the doorway like this."
Come into my parlor said the spider to the fly. Of course, any sensible fly would decline, but there had always been a line for Hartley that caused his sensibility to fail. Primarily it had been his parents that had been able to tread on it, to pull him into situations where he got repeatedly hurt despite the hope things would change, but Eobard liked to think that he had some pull there as well.