They examined 26,836 men, and it turned out how tight pants affect fertility.

A recent study in China involving over 21,000 men found that wearing tight underwear is linked to decreased sperm quality and quantity. The research indicated an 18% increased risk of lower sperm count among those wearing tight underwear, along with higher rates of slow-moving sperm and DNA damage. Additionally, tight underwear may contribute to erectile dysfunction and early ejaculation. Researchers suggest that opting for looser clothing could help alleviate fertility issues, although the exact causal relationship remains unclear. The findings highlight the importance of temperature regulation in the scrotum for optimal sperm development.