Appropriate outfit
When there's a heatwave you will often see men who have shed their T-shirts. However, this may be appropriate attire for the beach it is not as appropriate for the highstreet or the supermarket, but you still see it.
As a woman I would never go topless to the supermarket, or down the highstreet, but then I would not want anyone, male or otherwise to go topless down the highstreet, and especially not the supermarket, but for some reason it seems to be appropriate behavior... for men.
It is, however, inappropriate for young women and the police will intervene.
For their own safety off course!