The girls do this to eachother. They do this to the guys too.
But guys are never allowed to do such a thing. I mean, at least, we don't. We are all justifiably afraid I would imagine. Also, we aren't women so we tend to stray away from feminine things that women do.
But either way, men aren't allowed to say hi sweetie with a hug and a run my hands on your arm to a woman. That would never ever be appropriate unless you and the girl had established that kind of relationship previously.
It's OK. It's nice. I don't mind that the girls touch me and they're sweet to me. It's just funny how only they can do it.