How to stimulate prostate?
Buy a sex toy made for anal stimulation – b u t t plug, dildo etc. or use your index finger. You want to push in, then up toward your belly button. The prostate is a small gland that you can feel through the wall of the rectum. Gentle massage is all that is needed. Too rough and it may hurt. Use plenty of lubricant in any case, to avoid too much friction on the anal sphincter muscle.