I've been involved in the giving end, once or twice before. It's a beautiful thing! You have to be truly on top of the situation. You could be moving into position, there, and wind up getting a knee or an elbow or even a kicking foot smacking you hard enough to...uh...ruin your day! I saw that happen to someone. Shit, you have to be careful, anyway. When I was back in the Navy, this guy on my ship was riding in a train with this girl he was seeing, and as he was tickling her, she accidentally hit him in the face with her lit cigarette. Hot time in the old town tonight! 😛