Yeah, you might freeze your butt off, but the one thing enjoying the cooler weather down there is your sperm. A new study in Germany says that men who spent an hour in heated seats showed an increase in testicle temperature that was significant to harm sperm (from 95? to 99.14F). Sperm can be affected at 96.8?, so heated seats may be the culprit behind your low sperm count, say the study researchers as reported in Men’s Health.