Mason has a fear of water.
We've been partially thankful for this for a long time. It does make summertime water activities a bit more of a challenge. We never have had to worry about Mason wandering off and heading for a body of water. It simply wasn't in him. It took an act of Congress just to get him into the baby pool. With his anxiety around it, getting him in the water is much like getting my wife on turbulent flight.
Since he's 6 now, we decided it was high time we enrolled him in some sort of lessons and help him overcome, or manage, his fear of water.