"Wait, wait, like... like this?"
Dick gives an awkward flourish of his hands that looks remotely like the sign you'd just demonstrated right in front of his face like he had minus-twenty eyesight. In truth, he did. Kind of. In his own way.
Sure, you had hearing aids and the whole shebang, but he'd still insisted on trying to learn sign language. For you. If it were anyone else, he'd probably laugh uncomfortably and slowly back away like they had him at knife-point. Yes, knife-point. He felt his cheeks colour as you obviously tried to stifle your laughter at his "signing". The signing looked like he had two broken wrists, and all of his fingers were dislocated.
"So... not like this?" Dick murmured sheepishly with a light chuckle, giving the sign a second try, only to be corrected as you reached out to reposition his hands into the correct form. Okay, alright, so maybe, maybe his heart had sped up a wee bit when you'd held his hands. It wasn't fair, though, when you smiled at him like that. He's seen a lot of pretty people, hell, some were downright sinfully sexy, but you're so... you, that it puts them all to shame.
He doesn't know how you'd lost your hearing, and he's not going to ask. You're his partner, for life at that, and he'd rather die than make you uncomfortable. As long as he's with you, he could be content forever.