Well... to be fair it hasnt been THAT hot..... well not in London... yes it's been nice but i saw loadsa people wearing coats yesterday - i was probably one of the few in a t-shirt.
The last few days when it's been really nice I've been wrapped up because I'm just getting over the flu and don't want to risk anything.
Also some people are just always cold. I'm what you'd call a warm person and my boyfriend is always cold, so there's a never ending argument over the heating in our house
Not everybody feels the cold / warmth to the same degree.
I had an undiagnosed thyroid problem and was absolutely perished, even in the summer. However, after being put on the medication I am now constantly too warm.
You can't tell just by appearances what's going on can you ?