A couple of summers ago I was jogging in just shorts, in the french countryside (my wife is Parisian), it was 90 degrees - this farmer stopped his tractor, came over and read me the riot act; I put my shirt on.
From folks who wear nothing at the beach. All the same a little modesty is a good thing.
From a nation that wears nothing at beaches he gets mad about a male running in 90 degree heat without a shirt? The guy needs to get a life.