I distinctly recall an episode in Austin in the 1970s in which a young coed, with much advance publicity, walked topless across the UT campus. She was making a point about public nudity and that since men can’t be arrested for going shirtless, neither should women. This was early enough in the 1970s as really still to constitute the '60s, but even if it was progressive Austin, the incident shocked Texas as a whole. But she wasn’t arrested.
As a guy,I did a few things while shirtless.
1.Doing yard work when I had live in the country.
2. When I’m in bed sleeping.
3. Swimming
4. Hot tubbing
5. Shirtless running. (First done it when I was 40 years old.)
Let me tell you about a guy who is not wearing a shirt on the fourth of july event in Houston. First he’d showed up dry and later,he was wet and I’d thought being shirtless will keep you cool.
Only on my birthday.
Almost never. I want something I can rip out of if a zombie grabs me. 
Actually I do almost never go without a shirt even around the house and I’m one of those odd-balls who wear long sleeves a lot in the heat of summer. My skin burns easily and skin on furniture just isn’t comfortable to me; never was. Maybe it was the rural upbringing or something but that is just how I am.
She has to set an example, now that she’s FLOTUS.
In my younger days, sure. Now, not so much, even swimming I will wear a rashie. I am on several medications that have made me burn way to easy. As far as I’m concerned, I really don’t care if others wear one or not.
Dudes going shirtless is one of my pet peeves. If it’s 90 out and you’re mowing the lawn, go for it. If you’re at the beach, it’s totally appropriate. Otherwise put on a shirt. Nobody wants to see it.
Around here, 97% of the dudes running around without shirts are look-at-me douchebags. I swear to god, when the temp hits 50 some jackass will be out “running” shirtless trying to turn heads/get laid(?)/I don’t even know. Put on a shirt.
Know what pisses me off? Women running in sports bras and the like.
How dare ANYBODY wear the minimum amount of clothing required in order to attempt to stay cool while exercising.
Men–when do you go shirtless?
Only when I’m on an episode of Cops.
mmm
Whenever I’m exercising outdoors by myself and I’m working up a sweat, which is pretty much whenever it’s above 60 degrees, which is pretty much 11 months of the year here. The alternative is exercising less because of all the sweat and heat which I figure is less healthy than the increased skin cancer risk.
Is good, go shirtless. Now with new president installed, I heff direction from “higher ups” (ha, ha) that all male persons should take off shirt whenever possible.
You misunderstand me. There’s a difference between trying to stay cool and trying to get attention.
Any time I’m on horseback.
And you know they’re trying to get attention…how?
When I’m unexpectedly answering my door at 2 am.
AND when I’m hanging out with Vladmir Putin.