I run a lot and am around other runners a lot, so I don’t think twice about going shirtless when its really hot (or wearing my short-shorts for that matter)
But this only applies while running, otherwise, only if I’m at a pool/beach.
I’m taking my boat up to the Apostle Islands on Lake Superior for a week. The weather looks like it’ll be great. I suspect I’ll go shirtless for the week. Even at the small town on the main island, where admittedly, they don’t enforce any sort of “No shirts, no shoes, no service” rule.
I take my shirt off for two reasons: to shower and to make love, and I do neither of those things in public.
For a long time I wouldn’t wear shorts or T-shirts even since I was modest about my body. Over the years I’ve grown out of it a bit, I’m finally comfortable taking my shirt off at the waterpark or beach, but never anywhere else even around the house (I live with my sister and she stays fully dressed too.) I still won’t change in public or let a doctor see “downstairs” or use communal changing rooms / showers.
Outside my apartment? Pretty much never. I don’t tan, I go straight to burn.
At my house when mowing or doing work outside sometimes, but if I’m in the sun I will actually keep my shirt on to prevent sunburn. I don’t have any close neighbors. Walking down the street? Never did it unless it was down Atlantic Avenue in Virginia Beach or something.
Same deal here.
Plus my dad had half his face rebuilt two years ago due to skin C, and my dermatologist keeps cryozapping lesions and divoting black spots off of me.
The beach or doing yard work (and usually not even the latter).
As a youth, I was a beanpole and self-conscious, but my love for the beach won out and I figured, screw it, it’s just not worth the worry. I felt a lot better after that.
If I was in a vacation community where it was common, and the weather was conducive, I might go shirtless. But not if it’s really hot. Frankly, I’d rather have a cotton tshirt on, if I’m sweating and can’t take a quick dunk.
Swimming
Mowing
Grilling
Running
Sitting and drinking
In the shower and in bed. The end.
I’ve been running shirtless on hot days for years, but I’ve never been completely comfortable with it. It seems a little rude, especially when there are families around. Yet, it means I have so much less laundry to do and there aren’t a bunch of sweat-soaked, smelly shirts lying around my room all the time.
Lately I’ve started at least wearing a wife beater during my summer jogs, and I’m looking to buy one of those space-age fabric shirts that keep you from sweating a lot no matter how hot it is.
I don’t see what’s rude about it.
And if you’re as sweaty as me, there’s not a shirt in the world that will keep you from sweating :mad:
I’m the same. The amount I sweat on a summer jog has slackened many jaws.
Frankly, my appearance on these jogs is a little distasteful, I think - a bare-chested guy glistening with sweat. Part of my discomfort with it is just self-consciousness.
When I mow the backyard. I sweat like a piggie and the backyard is pretty private. Better than working in a soaked shirt.
I’m slightly over weight, not grossly so. At my age you don’t have chiseled abs. I take the shirt off in my yard or hiking back trails. I will not go shirtless in a heavily urban place. This has nothing to do with duration, as I will not burn myself from a long exposure. My bouts are 30 to 60 minutes long at the most.
Now i know one person besides my family that have been to Madeline Island. Pristine is now I’d describe the water.
Sadly, it’s never the RIGHT men…when traveling Europe, I noticed this universal vanity extended to Speedos despite some specimens being 40+ years past the point of physical viability (in fact, it was occasionally impossible to discern said swimsuit without - I presume - an exploratory (hazmat?) mission between the folds!); chalk up one more defect to the XY chromosomal models 
Never. Gotten so fat and insecure about my appearance that I avoid swimming pools and the ocean. So, never.
In the shower, and actively in the water (it comes off right before I go in and goes back on when I come out, and if I have a dry one standing by sometimes I’ll just keep it on).
It’s not just a body image thing, though I certainly have that. I just really don’t like being without a shirt. I don’t even like to sleep without one when I’m alone in my house.
But if there is someone else in your house, you will feel comfortable sleeping shirtless? 