but hollywood movies make it seem like people still inevitably sleep in the bed naked anyway

As is customary, Hollywood is lying to you. You don’t fuck and be merry and fall asleep. The ladies usually go pee afterwards (helps for everyone to prevent uti) and with creampies a shower after is basically essential.

Replacing the sheets depends on how dirty they got, but it can usually wait till next morning. Sex is pretty exhausting and we are all a little lazy.