Brain energy is the natural antagonist of penis tip energy. If you have issues with your orgasm energy getting stuck in the tip (which leads you to ejaculate), you are not allowing enough energy into your brain. You can mitigate this by pushing energy into your brain before you orgasm and, during the orgasm, focusing on brain energy exclusively. Afterwards, make sure you bring the energy from your brain back down into your body through slow, deep breathing while meditating.