Favorite/most effective position for a prostate massage?

I'm meeting a lady this afternoon for a series of enemas and prostate massage(s); light enema, prostate massage, another enema, another prostate massage and a final full clean-out enema. Guys, what is your favorite position to get a prostate massage? Ladies, what is the most comfortable position for you to give a prostate massage? The enemas are “no problem”!!! (lol)

On my stomach, legs spread wide.

On all fours so I can see the result of the prostate massage emission.

My favorite position is on my back with my legs pulled back and my wife has her finger going in and out while she strokes my cock, second is on my hands and knees with my ass high in the sky

On my back, partner sitting in tailor posture, my legs over hers. She can massage and stroke easily and I can observe.

As more comments come in, it would be interesting to tally the results! On your back gives the person massaging you good access to reach your prostate with the palm up position and do the “come hither” maneuver. This way the whole arm can get more involved in a lifting motion. While on all fours one has good access, but it seems to be harder to do the maneuver with the palm pointed down. IMO the givers have better access when on your back as described by @UncleO and @eman445.

I give prostate massages and knee to chest is the best because I can push down firmly on the prostate. If you are on your back, I have to pull upward to get pressure on the prostate.