Maybe what I said wasn't enough, so let me add this. Since I was a little kid I've dreamed about being into someone so much that I gave my genitals to them, literally, like mine belong to you, they're ours now. I've never felt like I could do that wholely if the other guy has his own or wants them anyway. Like they'd be a barrier between us. We could never be as physically and emotionally intimate.
I've wanted to please him, too. To take care of him. To take responsibility for his health and happiness. In fact to feel obligated to do it in exchange for what he gave up. I guess though I couldn't have known it as a little boy to be the best, most loving, adoring, and attentive top in the world for the ultimate bottom.
Does that make sense?
Drew