How Many Keys On A Key Ring Are Too Many

The other day I went out to start my car. It was cold and since I always lock my car I had to fumble for my keys. Now I don't think I have an excessive number of keys on my key ring but it took me almost a minute to find the right one, separate it from the pack and get it into the lock so I could get into the car and warm up.

I got to work and--just for the heck of it--decided to count how many keys were on the ring. There was a house key, a car key, an office key, my wife's car key, a key to my safe box and two that I have no idea what they are for. I always marvel at how our chief engineer at the station can keep so many keys on his chain and still find the right one presto-chango. Must be a science to it!