Any advice On How to get your toddler to stop climbing all over you? I’m so uncomfortable and I…

Any advice On How to get your toddler to stop climbing all over you? I’m so uncomfortable and I really can’t take him constantly climbing on me. I’ve tried to tell him no and explain that he’s hurting me but I’m not sure he understands. I also don’t want to be harsh and punish him for it because it’s totally innocent.