It sounds to me like he's enjoying it as much as you are, though of course the story you told us is all from your point of view.

The relationship I have with my little one started out as vanilla, though I was always Dominant over him, since our first date when I ordered his meal for him and he seemed relieved. But that was just the way we naturally fell, and sexually we were actually very boring. I was his first kiss and even a little tongue freaked him out.

I tried my hardest for a few years to keep it completely vanilla, and there was a lot of frustration, misery, and arguing between us, until the day I finally caved and just told him everything. By then we were very close and had a strong relationship.

First, he freaked out for two days. He told me he loved me, he needed to think, and that he never wanted to talk about it again, and that was the scariest moment of my life.

I brought it up the next day anyway and we talked some more.

A week later he offered his wrists to me and said "Can I be your sex slave, Mistress?"

For a week after that, every day I must have asked him several times if he really meant it. He did.

However, when I think back, I was totally, completely prepared to give up all things BDSM for him, and I knew I could do that, albeit very painfully.

So, my advice is the same as denuseri's- you might feel better if you tell him how you really feel. You can decide if you want to ease into it and tell him slowly, or just have one big conversation. It sounds to me like he'll be into at least some part of BDSM, and then the two of you can work out how much and when and such.

Good luck to you, truly.