My ex told me one day we were out of milk. I told him that wasn't possible because I had just bought some. I went to the refrigerator, and sitting right in front, at eye level, was a full gallon of milk. "Oh" he said, "I was looking for the half gallon size." Huh?
I once lost my son at a major league baseball game. I know, that doesn't sound good. It was Little League Day, and all the kids were wearing their uniforms. My son spotted a boy he knew from another team, and asked if he could go say hi. It sounded okay to me so I said yes. Two innings later, he hadn't returned. I stood up and scanned the crowd. No sign of him. I reported him missing, and three employees of the ballpark showed up wanting a description. The two men and one woman took off on their search. What happened next put this whole experience in my top five scariest moments of my life. The game ended. Now, everyone was standing and filling the aisles. Just as the most horrifying thoughts were going through my mind, I saw the female employee coming my way, big smile on her face, and my son in tow. I never saw the two men again. For all I know, they are still looking for him.
Perhaps their acuity for focusing makes men unable to find things as well as women. If you asked Waldo to find himself, there is a good chance he couldn't. He might have the excuse "I thought I was taller than that." If male US soldiers were told to infiltrate a home because there was a chance Saddam Hussein was hiding there, they might have walked right by Osama bin Laden sitting on the couch watching Dancing with the Stars.
On the other hand, there are times when complete focus is necessary, and most women would fail at this. An example would be....uh...um...I don't know...what was I saying?