One day my wife brought a jar and asked me to open it for her. I tried and tried to open that jar, but my hands just weren't strong enough to hold the jar tightly and turn the lid. It is a little embarrassing to a man when a woman asks him to open a jar and he can't do it, so I decided that I needed to increase the strength in my hands. I got a hand exerciser to help me. You have probably seen one of these. You just squeeze the two sides together, like this. If y…