Body exploration in child, is this normal?

My son will be two in a few months and the past couple of months he has been self exploring. Whenever I'm changing his diaper or giving him a bath he will grab at himself. I know this is pretty normal as they become self aware of their own body and what not, so I'm not too concerned about that.

However, as of recently he has been really grabbing at my body. He will try to take my shirt off and grab at my boobs (wouldn't concern me if he was breastfed but he was bottle fed) and he is always shoving his hands in between my legs. Is it normal for him to want to be exploring my body or others bodys also? I correct him when he does it and tell him no but he doesn't listen at all. He has also begun to hump objects ie stuffed animals and blankets. My mom brought up the behavior to me as I've only seen him do it a couple times and she mentioned it to me after he did it while she was watching him. Is this all normal behavior for a child his age or should I be concerned and contact his pediatrician?

The only people who watch him and are alone with him is myself, his father, my parents and my brother and sister in law (they have 4 children ages 13 to 3). I really dont foresee anyone abusing him in any manner but I'm getting worried as I was sexually abused as a child by a family member. I just dont want to be blindsided and have let something happen to him as I would be devastated.