"Is it just me or is it really warm in here?"

I'm sorry but I think that a socially acceptable answer to the above question - when posed in the context of the workplace at least - should be:"No. No, it's not. You're just bloody fat. Do you see anyone else under a size 18 wandering around in a vest top in winter? No. No you do not. Now shut the window, switch off the air con and try not to eat a whole box of boiled sweets again today, eh?"