First of all, thanks for the explanation of "short pants". I am still learning something new every day.
Wow, if you get too hot at 23 degrees you must be one "high burning" individual. I think it was Balzac who said the ideal husband always has the complementary temperature to his wife, so he can warm her when she is cold and vice-versa.
I like polo shirts because they are more formal than a plain white T-shirt and they protect the neck at least a little bit from those cruel drafts you can get in planes and that can lead to terrible muscle pain.
Actually, in this context I have already thought about using a hoodie sweatshirt even if that is so not my style otherwise.
Till