Your T should have asked if it was OK first. Lots of people don't like hugging for all kinds of reasons. Even though I tend to like them, the first time my T gave me one I wasn't expecting it and I was in the middle of a full crying meltdown. Later he said he was sorry for not asking first. But I'm glad that he did.

It doesn't mean your T is a predator or anything, it is just unusual to get one right off of the bat, without permission too. You should be honest with him and bring it up if you can!