The genetics of the human race are imperilled.
iPhones, powerlines and those glow in the dark stars nine-year-old you stuck all over your bedroom have filled our living environment with enough radiation to have us all riding recumbents within a generation.
You're not going to wear lead undies, but there is one thing you can do to preserve the integrity of your gametes: protect them from impact by standing for speed bumps.
This is especially true if you prefer boxer shorts or go commando.
BONUS TIP: Grab some mad air as you go over the speed bump, and if there are any suitable parties observing, you may just increase your chances of passing on those genes.