I have experimented for several years and have found that my best sessions tended to be short and intense. The longer sessions were good for practice and training, but most of my pleasure comes within the first 15 minutes.
I find that I lose arousal after 30 minutes or so which ends the session. Sometimes shortly after sessions the arousal comes back and I get mini aless pwaves.
Last night I had an under 20 minute session that was amazing. 1 minute in I got a pwave that made me moan and it was just another 7 minutes of pwaves every few seconds. Had to put a pillow over my mouth. The waves slowed down and I just laid there for a few minutes.
I find that I start to get uncomfortable just laying there with my legs up.
It’s probably a good thing because if I could have hours of pleasure I would never accomplish anything.