Can't wait for the public to hear Biden's enlightening views on Anita Hill and Indian-Americans. Also not counting the potential metoo stuff that's bound to exploded when the primary season gets closer to scheduled.
What really makes you think Biden is like that? Grabbing people's shoulders or standing to close might indicate lack of social awareness, but it doesn't make you someone who sexually assaults people. A lot of older grandfathers act the way Biden does around women. His touching them isn't sexual in nature at all.
Biden will know if he has a #metoo moment in his past. He won't run if he does. I'm sure something will be thrown out there with how dirty of a campaign 2020 will be, but it likely won't be credible.