###Human: I have liquid discharge coming from urethra. What is it? ###Assistant: Hi. The discharge is semen. It happens commonly in young men who are not sexually active. The body keeps producing semen, and when there is pelvic pressure or pressure on the perineum or when there are erotic thoughts, there is a spontaneous discharge. It can also occur during sleep. It will not harm your body. There is no need to take medicines. Usually, it gets decreased when a person becomes sexually active.