It is great that he's feeling more like playing with you now! How awesome.
Bing looks like he's shed a lot of his facial darkness out. He's a pretty boy.
I don't know what its like to deal with male hormones, I've only had girl rabbits. But I know rabbit pee does stink! A LOT. I don't know what I would do if my rabbit sprayed me or anything, I would cry. Poop is easy enough to clean, but pee is gross.