text: why is 72 degrees the ideal temperture?   72 degrees is the temperature at which our body heat is comfortably exchanged with our surrounding environment (air).  in cold weather, like 30-40 degrees farenheit, notice that the heat from our bodies is lost very quickly, leaving us feeling very cold, very fast.   the quickness of the exchange is relatively uncomfortable because our body cannot generate heat as quickly as it is losing it.  in warmer weather, above 72 degrees f, the opposite will happen.  our bodies generate the same amount of heat, but we can't cool off fast enough.   that's why we start to sweat (a body cooling method), pant like dogs, and start looking for shade and cool showers..  we are trying to get rid of that "extra" heat.     so 72 is the ideal temp at which our bodies are in balance with our environment.   not too hot, but not too cold either.