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.
Statistically speaking, a 2005 study found that sex lasts 5.4 minutes on average, although that data does not take into account foreplay, female orgasm, or non-heterosexual pairings. For historical perspective, Alfred Kinsey's 1948 research found that 75 percent of American men ejaculated within the first two minutes of sex.