Penis Ejaculation
When a man has sexual intercourse with a woman, he places his erect penis within her vagina and moves it in and out. The vagina is warm and soft, and it places pressure on the man's penis. This makes the man have an orgasm and ejaculate. During orgasm, muscles push semen from the penis and into the vagina. Semen moves through the urethra and comes out of the hole at the tip of the penis.