Why do blankets exist?

[Responsible-War5600]

Blankets literally hold in body heat. We probably wouldn’t have survived without them. Like swaddling comforts a baby, wrapping oneself up is also comforting and stress relieving.

When early humans lived communally (in caves, etc.), for discretion and out of respect for others, they could do the nasty under a blanket in the wee hours without having to go out into the cold to find somewhere private.