has the baseball cap ever been washed and what color is it?

also, i have observed for myself, bees will nail anyone, including me, wearing certain types of straw hats, and guys wearing smelly, ragged baseball caps....
for example, last summer, we had mr. rivers nephew do some siding and roofing on a garage near my hives. he is a very gentle soul, but wears a twins baseball cap (maybe that was it....

he's from wisconsin, what a crime!) anyway, his wife is not allowed to wash that cap very often, and it is the most ragged looking thing i have seen. my bees kept nailing him up on the roof. i told him to take his hat off, and gave him another. they didn't bother him after that.
i had to quit wearing an old straw cowboy hat, i'd get nailed everytime i wore the thing. had a neighbor who sported a brand new stetson straw hat, and everytime he came over and we were in the garden my bees would not leave him alone until he took the hat off......
not a scientific experiment but........makes you wonder!