Do you ever notice that women on TV or in movies always seem to sleep wearing a bra?

If TV is to be grounded in any reality, enough to make the unreal of TV seem real enough to relate to, shouldn’t TV characters be as much like real people as possible? Real people sleep topless, and they sleep nude. It seems, IMO, 97% of TV women sleep in a bra. That doesn’t seem to reflect real women based off those I have known over the years. If you are a woman do you sleep in a bra, if so, why? Not like you have to support anything laying down.