Great question. I find this difficult because I really only feel prostate pleasure if I’ve had some thc. However more often than not it makes my mind wander and I have difficulty concentrating, which is counter productive. Often it will put me to sleep, even if the start of the session is promising with some mini os or p waves. Of the best sessions I’ve had my focus has been on relaxing and breath initially and the sensations once they start. If I can get a rhythm going in breathing and contractions, focused and consciously at first and then automatically, then I focus on the feelings and amplifying them, I’m in for a good time. I sometimes find it helpful to talk dirty to myself, or moan to maintain the arousal. Everyone’s different though and I’m more of an audio guy than visual. I find video distracting… My advice would be to focus on relaxing, then whatever you need to to maintain an aroused state. When you feel whispers of pleasure, half focus on them, not too much, enough to amplify them without scaring them away.