Haha, well I'm too young to be a father anyways But, I get your point...not that it matters THAT much. Men make sperm everyday, so it's not a big deal for us.
I use a headset for my cell phone to reduce some of that radiation (also helps me to do other things and talk at the same time). But these days, everything contributes to cancer or some other ailment. Might as well live it up and get the most out of what life has to offer.
I also use a head set.. but I also have it in my pocket, and I'm still as horny (pardon the bluntness) as always. Hell, breathing the air in Los Angeles is more dangerous.