Be careful what you sit on!
According to scientists men who use heated car seats could be unwittingly putting their fertility at risk. A healthy sperm is produced at temperature between 35 and 36 °C, but the warm seats raise men’s temperature to unhealthy levels.
Thirty healthy men were tested. Their "junk" was fitted with temperature sensors, and they were asked to spend 90 minutes on the heated seats. The average temperature achieved was 37.3 °C. The conclusion was that the average rise in temperature could be enough to damage sperm production.
So I guess the moral of the story here is to buy less condoms and go for longer drives.
Source: Daily Telegraph