tips for masturbating one's hole?

Hi Everybody,

I recently had a urological procedure that puts sex, Aneros use or anything that involves ejaculatory or prostate orgasm off-limits temporarily while I recover... for weeks and weeks and weeks.

I have started easing into things with anal masturbation. Since I can't use the Aneros, I have been doing it the old-fashioned way: finger on hole, similar to a girl on her pussy. (This idea makes me very hot).

I have had some anal orgasms this way and I want more.

Problem is, I don't get consistent results. I kind of feel like some women do: orgasms are a little elusive.

I have done it lying on my back, legs bent and spread, hand reaching down to get my fingers on my hole (like a standard female masturbation pose... hot!) and also lying on my side and reaching in from behind. In both cases I had boxers on and they were between my hole and my finger.

Anybody finger their hole to orgasm that wants to give some tips for consistent results? God knows I need them, I am so darn horny.

Thanks,
Darwin