Why do the shirtless units shave their bodies?

[Tellos Athenaios]

As O' ETAIROS already mentioned the Greeks and Romans used different albeit similarly effective methods of washing themselves.

Now to get back to the bit about shaving:

a) Not every man develops body hair on the chest;
b) Not every man develops dark black body hair on the chest whilst having a very pale skin;
c) People who go out in the sun without a lot in the way of sun block tend to develop a distinctive tan. And incidentally, sun light tends to 'bleach' hair.

So if the Celts only shaved regularly; then even right in the middle between two 'shaving days' the body hair wouldn't be all that distinctive a feature. It doesn't grow quite as fast as a moustache, you know. (?) Anywho add the already outlined reasoning; plus that of others to the simple fact there's only 1 guy being cloned approximately 240 times the amount of units over on hughe unit sizes... Need one say more?

EDIT: Though I do have to say that in Italy one tends to sweat significantly less than say over here in the Netherlands doing the same work. Regardless of temperature differences (which aren't that significant anyways); since the air is a lot more dry in Italy than it is in the Netherlands.