He'd know the word but wasn't quite at asking for it out loud just yet. He'd get there, he'd come so far. Before, even asking for a hug had seemed to be too much, and here he was, asking to ride someone. He pushed and pressed himself into things and was finding out the hard way that sometimes it was worth it.
As much as he didn't want to get off of Joseph, he did have to get closer to the headboard to find that little button. Before he did, he gently bit into the ear he had been talking to before rolling carefully off of him and going for the end of the bed on his knees.
Fingers swept over smooth material, looking for anything different before his fingers caught on what could only be the switch he was looking for. How handy was that? He could be in awe of it later, though, there were more important things he needed to get back to.