So it's been building for some time now, but a slow burn you could say. Sometimes that's the best, as with too much of a new person you can see too much, too soon and realize that it was never going to work. I like to think we are both cautious enough and wise enough not to rush rather than lacking any spark.
So we come to the part which is relevant here. For the first few months we had been nothing but oral/vaginal sex so I asked him one time how he felt about anal (it has been too long since my last encounter

I should have known.

Sadly he didn't manage more than a few thrusts before he came. All the same I enjoyed it and the next time the tension wasn't there.
And since then he's been requesting anal with me pretty much every time. I'm okay with that and to be perfectly honest I've been getting off on his obvious excitement. At this point I should add that, while I'm really fascinated by the lifestyle, and I'm probably highly unusual for a woman who's accepting and enjoys anal sex, I do still like vaginal. It's true I had been exclusively anal with someone before but that had been more for their benefit.
It will be interesting to see how far this one goes.