During sex, very soon I get ejaculated. What should I do to increase my stamina?
masturbate and practice stopping just before you reach the point of no return where you are going ejaculate. Keep increasing the number of times you do this each time. (So first time get to the point of no return once, wait a couple of minutes and then masturbate to ejaculation, next time do it twice etc) This will help you learn to control the need to ejaculate.