I was struggling with the heat in Greece last week as some of my polo shirts were too thick. I considered wearing my sleeveless gym top, but in the end backed out, because ... I'd already broken one 'convention' by wearing speedos, and didn't feel confident to break another one. While the vast majority of women under 50 wore sleeveless tops there, hardly any men did.
The modern dress conventions is that men should not expose their upper legs or upper arms. T-shirts down to the elbows and shorts down to the knees is the standard of modesty we should all aspire to.
