Premature ejaculation occurs when a man has an orgasm and ejaculates earlier during intercourse than he or his partner would like. It's a common problem, affecting 30% to 40% of men. Causes include physical problems, chemical imbalances and emotional/psychological factors.
How can I increase my ejaculation time?
masturbating 1 to 2 hours before having sex. using a thick condom to help decrease sensation. taking a deep breath to briefly shut down the ejaculatory reflex (an automatic reflex of the body, during which you ejaculate) having sex with your partner on top (to allow them to pull away when you're close to ejaculating)
Does masturbation cause immature ejaculation?
Excessive masturbation may cause damage to the nerves that allow for the ejaculation. This can cause premature ejaculation or even an ejaculation during sleep.