Different cultures are used to different codes of dressing

A half-naked foreigner was seen at a MRT station and this evoked various reactions. Perhaps Singapore, being an Asian country, is unused to such 'free' and "casual" dressing. I have a friend who is residing in Perth and he told me that some of the men over there do take trains with merely their bermudas, due to the extremely hot and dry climate. I guess personal comfort takes precedence over codes of dressing for them.