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.
Usually the capability to ejaculate semen comes about one to two years after puberty starts -- often about the time pubic hair begins to grow and a boy begins his growth spurt. The average age for starting puberty is 11 1/2. This makes the average age to ejaculating semen around the age of 13. But this is only an average.