When the body has cooled itself enough the brain sends signals to the sweat glands to stop producing sweat and the process is halted.  this is all a normal part of why humans sweat,. Originally posted by bowlie. Its because it burns more calories. Wearing a sweater makes you hot wich makes you sweat. It uses up 0. 51 calories every time you swear a dram of. I wear hoodies and sweatshirts in the summer because most of the places i'm on my way to are cold inside. [deleted] · 4 yr. I do occasionally when working because the air is on. Layer a lightweight one over a dress, romper, shorts, or anything pastel or floral.