he love you and want to stay with you you can keep him warm
To conserve body heat/stay warm.
Well, first of all, animals cuddle with each other when they want warmth or protection. Most animals do this. I mean think about it, why do humans cuddle? Is not a thorow answer. The answer is animals do this to keep warm so they aren't too cold. Some animals do this because they have to, to survive. Others do this for protection, which I will give credit to the first person who answered this. But, the first person who answered this left out what animals do this. Meerkats & maybe lions do this, but these are not the only animals to do this. That is my edit to this answer. (:
Euglena are not warm blooded animals, however they need to stay warm to live. They also can live inside of a warm blooded animal.
Most animals have a type of fur that allows them to stay warm.
warmblooded animals keep warm by generating their own heat when they are in a cooler environment.
they stay inside and stay near warm places
they can cuddle their cubs too keep them warm.
they need to find ways to stay warm
Some behavioral adaptations that allow animals to stay warm is hibernation, packing together and digging holes in the ground for shelter, and getting fat in the summer.
No warm blooded animals die within 30-42 seconds of being in an environment that is more than .4 degrees colder then their internal body temperature. This is a severe danger to animals such as humans and small Brazilian mamalez who visit antarctika on their kwanza school break.
Because it is warm and all animals like warmth. It is also very good for predatory animals.