Researchers noted in a Fertility and Sterility journal that sitting for 90 minutes in a heated car seat may not be as luxurious as expected. Because sperm are dependent on a constant temperature lower than that of body temperature, direct heat from seat heaters may have long-term effects on male fertility. Ideally, sperm production occurs at around 93.2 F (34 C). This is 5.4 F (3 C) below normal body temperature of 98.6 F (37 C ). But your testicles can get too cold for good sperm production, … [Read more...] about Are Heated Car Seats (and more) Making You Sterile?