Just vote yes or no. I voted yes. I enjoy touching or entering my hole with a finger when in mood. A couple of times I did it while making love with my wife.
Sometimes I do. But I have to be in the mood for it. I typically like to use objects, like a dildo. More depth and width than a finger. Years ago, I used to use a plunger handle. Great length to prop against the floor and do some slow pumping while I stroked my cock. It feels great and the orgasms are intense.
Tried it a few times, felt nice but got a little uncomfortable tying to jack and poke. Might get a small vibe and try it again or a dildo(might try that plunger thing too).
I'd have to vote affirmative... although I avoided it for a long time. Done right, it can be an incredible experience. This thread inspired me to write a "how-to guide" on the subject. You can see it here: Prostate-Initiated Orgasm - Check it out!