Hello doctor how can I prevent premature ejaculation (for having more joy)? does returning sperm in to prostate zone have harmful side effects? (i am 25)

Premature. Ejaculation is sometimes called ill-timed ejaculation. It is a subjective evaluation. You may orgasm too quickly and not satisfy your partner. If you have concerns you can see your doc or a licensed sex therapist. It is not an illness. Peace and good health.