What do you buy your father for his birthday when you know that you can’t afford the Ferrari Dino 246 that he wants? My children decided on a pair of socks. As a dutiful parent, I gushed that I’d always lusted after a pair of these, but hadn’t been able to afford them. When I wore them, they proved to be comfortable, and kept my feet dry. I took to wearing them on my longer runs, and they didn’t let …