Premature ejaculation (PE) is the most common sexual problem in men, affecting up to one in three at some point in life. It is defined clinically as ejaculation that consistently occurs within about one minute of penetration and that causes distress for the person or their partner.

PE often has a psychological component (anxiety, performance pressure, relationship stress) but it can also be driven by biology — particularly variations in serotonin signalling. Both are treatable, often together: medication slows ejaculation, while behavioural techniques and counselling address the psychological side.