Bucky & Jack
If he'd been able to, Jack might have actually laughed in delight at the feel of Bucky letting go of his restraint a bit. He loved feeling folks unwind--even if it sometimes took a really long time for them to let go of everything that was holding them back, it was inevitably worth it in the end.
As it was, he let himself lean in a bit further, meeting Bucky's increase in pressure and moving his head just a bit into the metal fingertips. He wouldn't say anything cheap about also having lovers who'd technically been androids, at least not right now--right now, he was just going to enjoy the person with him, who was hopefully going to feel just a bit better about who he was after tonight.