You MASSAGE your prostate to give yourself pleasure, what you actually milk is the SEMINAL VESICLE which is outside the prostate. That's where the body stores the fluid that the prostate PUMPS. The prostate is the delivery system, not the storage system.
You can, it's easy. Just shove your middle finger up your ass deep and look for it, you'll feel its shape. And the best part is that you hand coming from the front points your finger the right way because the prostate in just behind the bladder. You have to be in fours for a guy to finger you from the back do that his finger can rub you also the same way.
I've tried for decades too and never found anything that feels good in there. Found something that feels 'weird' but not pleasant. People are telling me that is my prostate. It does nothing for me though.