why does semen become less viscous overtime after you ejaculate

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For clarification I’m talking 20/30 seconds it goes from floppy to pretty runny.

In: Biology

Male ejaculate is made up of two different things. Seminal fluid, which is made in the prostate, and sperm cells that come from the testicles. When you ejaculate, your prostate pushes the fluid out, which picks up the sperm on the way out.

It is the actual sperm cells that make ejaculate thick, and you only ejaculate so many sperm at a time. Once all the sperm are ejaculated, the remaining seminal fluid from the prostate will be thinner and more runny.

“After ejaculation, the latter part of the ejaculated semen coagulates immediately,[10] forming globules,[11] while the earlier part of the ejaculate typically does not.[12] After a period typically ranging from 15 – 30 minutes, prostate-specific antigen present in the semen causes the decoagulation of the seminal coagulum.[13] It is postulated that the initial clotting helps keep the semen in the vagina,[10] while liquefaction frees the sperm to make their journey to the ova.[10]”

From Wikipedia^
It says 15-30 minutes but I’ve also noticed this happen on a shorter timescale