10 Proven Sperm Killers
Most of these sperm killers have to do with heat... wearing briefs, using hot tubs, having a fever.
They also bring up certain electronics such as laptops and cellphones. I can't help but wonder if it's the electronics that are the issue or men who use electronics constantly are generally quite busy and stressed.
Obesity is also mentioned.
What other sperm killers do you know of?