The big O. The climax. The explosive finale. For men, this almost always involves ejaculation. But guys, have you ever wondered how much semen you’re actually meant to produce when you orgasm? It’s a ...

I read with interest your articles in the last few weeks on premature ejaculation.

Sperm cells are made in the testicles and carry the father's genetic material. A sperm cell has a head, neck, and tail to help it reach and fertilize the egg. Around 300 million sperm are released ...