Saunas can affect sperm quality. The effects of heated car seats, however, may depend on the intensity and duration of heat exposure. More scientific evidence is needed to make a definitive assessment on this subject. For healthy sperm production, the testicles need to remain at a temperature slightly lower than the body’s core temperature. Therefore, avoiding prolonged and frequent exposure to high temperatures may be beneficial. The key is to maintain the testicular area’s natural temperature balance.