Here's the scenario -- I wash my hands, spic and span. On the way out of the bathroom and to somewhere, I use one of my hands to open a number of doors, flip a lightswitch or two and, just for kicks, handle a television remote. Thus, I now have one shiny clean hand and one super-germy hand.
Somehow, I forget which hand is which and suddenly, I get a super bad itch in my eye. And uh, let's say I'm a nudist, too, so I can't use my sleeve or something, and there's no tissues or anything handy. Since I can't remember which hand is clean, I essentially just pick one at random, hope for the best and scratch my eye.
A few minutes later, my eye itches really badly again. Is it more advantageous to use the same hand to scratch it, or to switch and use the other hand?
The way I see it is this -- one clean hand, one dirty hand, two scratches. This gives three possibilities -- two clean scratches, two dirty scratches, or one of each.
If I don't switch my hand, I'm either getting two clean or two dirty scratches; the best or the worst possibility respectively. I have no idea of knowing which hand is clean and which is dirty, so it's 50/50 which one I end up with.
If I do switch my hand, I split the difference -- yes, I ensure a dirty scratch and have no possibility of two clean scratches, but I also avoid the worst possible outcome of two dirty scratches.
I admit, I'm weird. Discuss anyhow.
I have signitures disabled. If you do, too...you can't read this, so nevermind >_>