because they can
There put their butts in the air
yes it is
Because it's more comfortable than sleeping with their head in the air. 
no
Flying squirrels breathe air with lungs. They really don't fly, the actually glide using a flap of skin. They live in deciduous and coniferous forests.
Yes: small game. Rats, squirrels and small birds.
when they fart the warm air goes into their skin
No, there are lots of male air host(ess?)s, like male nurses.
They don't actually fly, they glide on the air using their skin flaps to create "lift".
An air host is a male, while an air hostess is a female.
it really is a bad idea to eat your air rifle.perhaps you mean"where may i shoot a squirrel with my air rifle,and then eat the squirrel?" in which case ,a good idea would be to look for roadkill squirrels,then you would know there were squirrels in the area.i know they are regarded as a pest,but it is still bad to shoot a female with nursing young.give it some thought.........
Rats are ground dwellers and don't do what squirrels do; which is jump from tree to tree. Squirrels need the extra stability that having a fluffy tail gives them during "flight" in mid-air when they jump from branch to branch.