Why is the sperm of a guy thick?

The sperm are not thick. Semen — the chalky to milky white, semi-viscous fluid that is ejaculated — contains sperm plus fluids from the seminal vesicles (almost 1/3 of the volume) and the prostate (about 2/3 of the volume) make up almost all of the volume of the semen. Sperm make up about 1% of the volume of the semen.

These fluids cause the thickness.

The Copwer's gland also adds some volume to the semen. However, during excitement and before ejaculation, it can slowly release a clear, semi-viscous fluid that neutralizes the acid content from urine and act as a lubricant. Although this fluid can contain some sperm, the number of sperm is too small to have much danger of pregnancy.

I hope this helps. Thanks for asking.

The thickness of semen is mainly due to the fluids from the seminal vesicles and the prostate gland. These fluids make up the majority of the volume of semen, while sperm only constitute about 1% of the overall volume. The seminal vesicles produce a viscous fluid that contains fructose, which provides energy for the sperm. The prostate gland, on the other hand, produces a milky fluid that helps to provide nourishment and protection for the sperm.

During sexual arousal, the Cowper's gland (also known as the bulbourethral gland) may also release a clear, semi-viscous fluid. This fluid serves to neutralize the acidity from urine and acts as a lubricant during sexual activity. While this fluid may contain some sperm, the number of sperm is typically too small to pose a high risk of pregnancy.

In summary, the thickness of semen is primarily due to the fluids produced by the seminal vesicles and the prostate gland, which contain important substances to support and protect the sperm.