When I was working as a systems support engineer for a mammoth software company, one of my fellow engineers came up behind me one day at my cubicle and started rubbing my neck. Did I ASK him to come rub my neck or otherwise give him some indication that would be appreciated? No. When he did, I told him to stop, that I didn't want my neck rubbed. At some point in the future, during a change in seating, his cubicle was put across from mine, and he told me he was scared of me. Well, heck YEAH. Nobody has a right, without permission, to cross boundaries with another person, and especially not a man putting his hands on a woman. 

I've seen, over time, a number of pictures and video of Joe Biden violating women (and children's) personal space. In one of the latest news articles, Lucy Flores, a former Nevada State Assemblywomen, said "It didn't feel sexual, it just felt like a total invasion of my space". 

Some questioned why she didn't say anything to Biden at that point but brought it up at a later time.

She said the moment was “shocking.”

“You don’t expect that kind of intimacy from someone so powerful and someone who you just have no relationship whatsoever to touch you and to feel you and to be so close to you in that way,” Flores said. “So I frankly just didn’t even know how to react. I was just shocked. I felt powerless. I felt like I couldn’t move. I just didn’t even know how to process it.”

Nancy Pelosi said "I think that it's important for the vice president and others to understand is it isn't what you intend, it's how you are received"

I well understand not necessarily saying something at the time something happens, and for a variety of reasons. Had an instance with a neighbor fairly recently in which the neighbor crossed property boundaries. The first time he did it, I had no idea why something had changed on the property and, only by happenstance at a later occasion through text messaging, was told by the wife that her husband had done the thing. In the interest of friendliness, I merely said thank you. Again, thank you to something done with good intentions, but without a word or permission or knowledge until I accidentally found out when I was told. I thought, well, this won't happen again, so I'm not going to make a big deal out of it. Except some months later, it happened again and also caused some property damage. That time I decided I needed to say something, with the understanding that the deed was done with good intentions, but shouldn't have been done without asking. Surprisingly, at least to me, the neighbors took umbrage and it was brought up that, after all, I said thank you the first time he did it, as if it was my fault for bringing it up. Lessons learned for me, I will always speak up the first time, as clearly this appeared to be a license for to do it again. 

For me, I have always had a strong sense of personal boundaries, and, while not perfect, appreciate when others also respect boundaries. When I have violated boundaries, I hope others will point it out so I can apologize and learn from it.