Do men also tend to get down perms regularly?

The guy's side hair sticks out really quickly.
I get recommended a down perm every time I get a haircut.

There are also many people who say it is convenient once you do it.
On the other hand, I am concerned because I've also heard that it damages the scalp and hair.

How long does it usually last?
I'm also curious if doing it often damages your hair a lot.