Modern trousers are usually too tight and dense, and become much tighter when you sit down. Clothing designers have not been paying attention to the needs of male anatomy and physiology. The penis and testicles are obviously designed to be free, cool, hanging and moving with the rhythm of the walking or thigh movements. This is logically important to the health. The healthiest thing is to be at home nude or wear the minimum amount of cool clothing.

Both trousers and underwear have a seam in the middle that gets even tighter when sitting down. Logically it disturbs nerve functions and the sensitive but vital micro circulation of the genitalia. To prevent this, men should be using very loose underwear (boxer shorts) and loose pants.

Best is to live without underwear at all. For men they have no practical purpose except for hygiene. One useful and hygiene habit is also to learn to wash the anus after toileting. After experimenting health-oriented men at least will be thrilled by the clean, loose, airy and comfortable underwear-free feeling. After a short adaptation period, there is no fear of feeling cold in the genitals either because they are full of vessels that bring in warm blood.

One cause (there are others too) of deterioration of the sperm is the rise of the temperature of the testicles up to 37°C with ordinary underwear and trousers. The optimal physiological temperature for the testes is 33°C. The testes have 4 separate mechanisms trying to keep this normal and healthy temperature. Normal clothing and sitting habits eliminate them all.

Straight pants are not too tight when you are standing… …but once you sit down, the harmful pressure is evident (same pants.)