The physical feeling of sexual energy literally has nothing to do with porn and masturbation.
Sexual energy is a physical sensation, an emotive energy running through your body. It is an alive and vibrant force.
If you can slowly start to train yourself to focus 100% on that feeling and learn to become very present to how good it feels in your body, then you learn to experience it directly, rather than always associating it with the action of engaging in PMO.
Focus on your direct experience only. When your mind wanders, keep bringing yourself back to the literal sensations in your body. Become curious about them.
Slowly, over time, you will be able to sit with these feelings longer and longer, until they simply become something to experience and enjoy, whenever they arise, in the same way you feel your joy without feeling the need to go do anything with it specifically, other than bask in its presence.