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The process by which the body produces sperm, including the effects of ejaculation on sperm count and quality.
Masturbation causes short‑term changes in semen volume and sperm concentration after recent ejaculations, but for men with normal baseline sperm parameters it does not impair long‑term fertility; sper...
A body of observational research shows that tight underwear and clothing can raise scrotal temperature and is associated in some studies with lower sperm concentration, total count and motility, but t...
Foreskin "dripping" with ejaculatory fluids is biologically plausible because two different fluids can emerge from the penis — pre-ejaculate (precum) during arousal and semen at ejaculation — and prec...