Something I thought about after reading heat and cold is the relief you get from going to one from the other. After being outside on a hot day, it’s extremely refreshing to go into an air-conditioned building. On a freezing day, hot chocolate is even more satisfying.
An interesting fact about heat is that a lot of it escapes from your head and neck because of the increased blood flow. Since my mother is a nurse, she always encouraged me to wear a hat to sleep, and I usually declined and woke up shivering.
In science, heat is related to the increased movement of particles, while cold decreases their movement.