It turned out what that man risks by wearing tight underwear

A recent large-scale study from China involving over 21,000 men found that wearing tight underwear negatively impacts sperm quality. Men wearing loose-fitting underwear had better sperm counts and motility compared to those in tight styles. The study also noted a higher incidence of erectile dysfunction and premature ejaculation among tight underwear wearers. However, the research does not establish a direct causal relationship between tight underwear and these issues.