Diffrent men and boys take different amounts of time to refill and be rea for more sex again. Even the same male can have different amounts of time needed to get erect again at different times throughout his life. Usually the younger the boy or man (once he's past puberty) the more times he can ejaculate in a row without resting. The ability to ejaculate more than once in a row without resting tends to slowly get less and less with age.But it varies a lot from one male to the next. Many young guys and boys can get hard right away again after ejaculation, within seconds or a few minutes. Middle aged men and younger guys may take 15 minutes to an hour to get erect again. Much older men can take up to 24 hours or more to get erect again after orgasm and ejaculation. A man's general health, sexual excitement level, frequency of sex, the amount of semen still in his balls, and other factors can impact the time needed to get erect again.