There are many reasons.
1) The obvious, your hair will grow too long and you won't be able to do anything with it and eventually, control it. Of course, people don't cut their hair and it looks cool, but they also don't wash it, so they can keep it stiff.
2) Although shampoo can treat this to a certain extent, haircuts keeps your hair clean as it disposes of older and smellier hairs, to let cleaner ones grow, so it keeps you hair nice.
3) It is always nice to have a new trim, so why not?!
you need to keep your hair clean so that you don't get lice.
you need to keep your hair clean because it part of the Hygine procedure
because your hair is healthy?!
You do not have to have your hair cut at all to wear hair extensions.
how should the hair be to produce the most precise cut
You would cut it just the same as any hair.
He should oil his hair regularly and consult a hair expert.
ummm.....wash your hair into sleek and thn cut to desire
yeah he's ugly with the new hair cut he should cut his hair like eminem.
with scissors
no she has perfect hair.
In the winter you should grow your hair out and in the summer either put your hair up or cut your hair
you should cut your hair when your hair is really long, or when it is really hot like on summer
no its impossible it cant be cut