It's summer, which can mean only one thing.
Hoards of topless, sweaty, greasy, overweight, paunchy, balding usually British men in the Supermarkets, walking down the High Streets, on the school run, you name it, they're doing it.
They are usually to be seen swaggering waddling along, clutching the t shirt that has been whipped off their sweaty torsos in their greasy mitts. Sometimes it's flung nonchalantly over one shoulder.
I counted 5 today. They fascinate and disgust me at the same time.
Is it a British thing?
Do men from other countries behave in this way? Or is it just our lot? 
On the beach? Fair enough.
Out in public? No - put a shirt on fgs. We don't wanna see your moobs.