If semen is only 2-5% sperm what is the rest of semen made up and what is it’s purpose, also why do men ejaculate 100-300 million sperm if only one is required to swim to fertilization?

Question

Like the question says what are the remaining contents of semen. In addition, can sperm survive inside the vagina or anywhere else without the remaining contents of semen. Also how does this compare with the contents in pre ejaculate. If sperm can’t survive without the contents of semen can they survive in the contents of pre ejaculate.

In: Biology

Answer 1

The rest of it is essentially waste, but it does function as lubricant. Men ejaculate so much sperm in order to increase the likelihood of fertilization as not every swimmer’s a winner lol.