reek - give off smoke, fumes, warm vapour, steam, etc.; Marshes reeking in the sun give out, emit, give off - give off, send forth, or discharge; as of light, heat, or radiation, vapor, etc.; The ozone layer blocks some harmful rays which the sun emits
An average human ejaculate contains about 180 million sperm (66 million/ml), but some ejaculates contain as many as 400 million sperm. Both quantity and quality of the sperm are important determinants of fertility. A man is considered clinically infertile if his sperm concentration falls below 20 million/ml semen.
Ejaculation is when a male person (or other male mammal) shoots out fluid from his erect penis after it has been aroused or stimulated (excited sexually). It happens when he has an orgasm. This article is about ejaculation in human beings. When a man is stimulated, his penis becomes erect. When he has an orgasm, semen comes out from the end of his penis. Semen contains sperm and other substances.