Planet Fitness Hack

That is a real lifehack!! Ha!
I've been on the older PF hydrobeds and thought the same thing, "I wonder if this could be used to massage the prostate..." 
I quit that gym and workout from home now, but a great tip sir!

Where on your body does the 28-33 range massage?  Tailbone?  Glutes?  Perineum?  Nice discovery.

@helical for me, on the new lounge chair hydro beds, 28-33 goes from my tailbone to just beyond perineum. You can adjust your position in the chair to get it just right. Combine with PC muscle flexes and voila.

And: the newer massage chairs let you focus on kneading and tapping right in your P area. Just hit the Custom button and stop the massage at the lowest end, then adjust intensity to your liking. Planet Fitness can be a wonderland if you experiment.