Men, the occasions in which you can politely subject strangers to your shirtless selves are clear and finite. And they follow:
at a water park or public pool
while doing your own yardwork, in the relative privacy of being on your own property
if you are Lenny Kravitz — then, honey, you don’t need to wear a shirt, EVER.
(I rest my case on this point)
Please note that the following times are not appropriate for going shirtless:
at carnivals or county fairs
especially not while walking down Main Street in your shorts and sandals with socks
Please plan and dress accordingly.