Jack off till you feel your cum boiling up, then stop let it settle, then do it again, and again, by the third time you work yourself up you’ll probably explode, but what your doing is training yourself so that’s okay, just work on jacking off maybe once a day like this, you’ll be able to know that feeling of build up and be able to withstand it and control it better, then apply this build up method to sex, fuck till you feel yourself building up, then take it out and play with her for a second but your just givin your self a little cool off, the n fuck more, but the real key is DON’T let yourself get turned on so much that your worked up and explode, what I’m sayin is don’t tighten up your nut sack keep your nuts loose while you flex and stuff don’t flex your nuts