Why does a guy friend always randomly grab my wrist and keep smirking at me?

[Anonymous]

He does this to only me which made me question it. We're not reallyy close though. He always hold my wrist and sometimes pull me to him by it.

[spartan55]

Why the hell are you even letting him do that? It's not okay.
And what does knowing WHY he does it even matter?
What really matters:
Are you okay with what he does? If not, how will you address it?

[Asker]

Why is it not okay?