intertwingly

I've always had flat feet.  Not a low arch, or a "fallen arches": my whole foot is in contact with the ground.  A wet footprint has a gentle wedge from the heel to the front of my foot - with no concave portion in the middle.

This has never bothered me.  I used to play soccer and routinely walk several miles.  I've been known to run through DFW.

When shopping for shoes recently, some Motion Control shoes were recommended to me based on the wear pattern on my existing shoes.  My wife confirms that my ankles curve in.  On the spot diagnosis by the shoe salesman: Over-pronation.

So I got some new shoes.  That was about a month ago.

Yesterday, I walked out in bare feet after it had rained.  On the way back into the garage, I noticed that my right footprint - and right footprint only - had a definite indication of an arch.

I'm not sure what to make of this.  Part of me feels that if I haven't had problems in 42 years...