All or Nothing

When it's hot outside you freeze on the train or bus.

When it's cold outside you roast.

Do air conditioning and heating really have to be full blast or nothing?

What happened to the idea of a thermostat?

I don't mind putting on or taking off a sweater. But I don't carry long underwear when it's hot, or shorts when it's snowing.

At first I thought I just had bad luck, but it happens so consistently and so many times that there's got to be some underlying design flaw.