What's going on if there is white stuff in the crotch of my underwear?

Semen: A white viscous liquid that becomes thinner and lighter in color after being left for a period of time, and has a light fishy smell. Semen is composed of sperm and seminal plasma. The so-called seminal plasma refers to a mixture of secretions from the accessory glands. Although there are many sperm, their volume accounts for less than 0.1% of the semen, and the rest is seminal plasma. When adult men suffer from prostate diseases such as prostatitis, semen will automatically slip out, which is medically called "spermatorrhea". Spermatorrhea usually occurs under certain sexual stimulation, such as browsing pornographic information, tight underwear, overly warm bedding, bladder accumulation (at night), etc. In addition, after masturbation or sexual intercourse, there will be semen residue in the urethra; with the excretion of urine, the residual semen will be flushed out of the urethra, and some of it will be stained at the urethral opening. So when you think you have wiped it clean after masturbation, there will still be a small amount of liquid flowing out.

Prostatic fluid: a thin white, translucent liquid with a certain viscosity. Prostatic fluid is the secretion of the prostate. The secretion of prostatic fluid is controlled by male hormones, and the daily secretion volume is about 0.5 to 2 ml. It is an important component of semen and one of the seminal plasma components in semen, accounting for about 1/10 to 1/3 of the ejaculated semen. 1/6 is about 0.5 ml. In the ejaculation sequence, prostatic fluid is one of the leading components of semen.

Bulbourethral gland fluid: a colorless, thin, transparent liquid with a certain viscosity. It usually flows out of the urethra under the influence of sexual stimulation and can play a certain lubricating role in sexual intercourse. It usually occurs under sexual stimulation or when the bulbourethral gland is squeezed by external force (such as sitting for a long time). Normal adult males will secrete a large amount of it, and the secretion volume will decrease with age.

Different fluids will flow out at corresponding physiological times. Normal physiological phenomena are not something to worry about or panic about. The key is to observe and monitor well. Sometimes you should not worry too much, but sometimes you should face it positively.