Male average time is 3-5 minutes of penetration thrusting. Anything more than that comes down to diminished sensitivity for a variety of reasons. It is also possible to train to orgasm but not ejaculate but that takes time and training apparently and something to do with jelly jaw, which is a by product of relaxing your upper body muscles.
As stated earlier, people with large uncircumcised cocks receive more friction and generally spunk quicker as a result. The hammering you see with people with large cocks in porn are cut and remove from the scenes the other spunk ups they have during the making of themovie, they have been circumcised (male genital mutilation), and they have cummed multiple times already which we all know makes cumming harder, thus last longer. The male porno stars from Asia last longer because their cocks are smaller and there is less friction on the end of their cocks due to limited size of the organ.
I generally believe that the scientific facts above refute the myth of sexual stamina in the vast majority of people - evolution never intended man to take a long time cumming, most notably because the girl might wake up and run away . So therefore, anyone who claims superior sexual stamina is basically admitting that they have a tiny little cock like a button mushroom sitting on a bed of cress. As for me? I cum in about 20 seconds as my cock is that big and wide.
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Last edited by akka at 15-4-2016 09:23 ]