Dear Mr. Dad: A few years ago, you wrote a column about male infertility. I remember being surprised, since I'd always thought women were the only ones who had fertility problems. But now, after several years of being unable to conceive, I just found out that, just like the man who'd written to you back then, that the issue is mine. And, like him, I'm shattered. I'm thrashing around, looking for anything I can do to undo whatever the problems are and to feel like a man again. Is there anything I should do – or stop doing – that can help?