You must have touched the dirtiest thing on a man.

According to a new study from Imperial College London, three-fifths of British men are too lazy to change their underwear every day. The survey results of domestic medical experts also show that only about 1/5 of people change their underwear every day. Medical experts say: Men’s laziness in changing their underwear seriously threatens their health, and this creates health risks for men. Experts offer some guidelines for men on choosing and wearing underwear:

Underwear should be updated in a timely manner.

A statistic shows that men only change their underwear once every eight years. Regardless of whether this number is accurate, once the underwear has small holes, cracks, slight wear and tear, turns yellow and old, or emits an odor, it should be thrown away immediately and replaced at the latest every six months.

Men should have at least 10 pairs of underwear.

That is, 1 each day for 7 days a week, 2 extra on weekend nights, and 1 more as an emergency backup. Men who exercise a lot, people who often need to work outdoors, and men who sweat a lot need to prepare more spare underwear.

Choose underwear that suits you. Underwear should not be too tight (the testicles will be squeezed and the high temperature will affect fertility) nor too loose (not enough support). Boxer briefs are suitable for wearing in various occasions. They can provide sufficient support for men's private parts, but when sleeping at night, you need to change into loose boxer briefs to allow them to breathe. You can also choose boxer briefs, which can provide the best support for men's private parts and are suitable for various physical exercises.

Don't wash several at the same time.

Dirty underwear can carry small amounts of fecal matter and cause disease. Underwear should be washed immediately after each wear, even if you only wear it overnight. Microbiologists from all over the world have conducted research on washing machines. They found that a pair of dirty underwear carries an average of 0.1 grams of bacteria, including Salmonella, E. coli and other pathogens. Even if they are washed and dried properly, it is impossible to completely kill the bacteria. If you wash multiple pairs of dirty underwear at the same time, it may bring tens of millions of E. coli into the washing machine drum and contaminate other clothes through the water quality, which may cause the user's eyes to become bloodshot, skin to itch, and breathing difficulties.

The other half should urge and remind.

Surveys show that single men are less willing to change their underwear than married men. Richard Cairns, a senior expert in British consumer behavior analysis, said: "The underwear worn by lazy men will emit a unique unpleasant smell. Having a spouse will play a positive role in promoting their changing habits, and men as husbands will maintain the good habit of changing underwear frequently.

Also, don't wear just outer pants without underwear. People who dress like this may feel that their lower body is very loose, especially in the hot summer, when many men only wear a pair of loose beach pants outside. However, it not only greatly increases the possibility of exposure, but also makes vulnerable parts more susceptible to friction from the fabric.