I'm confused too! Are they suggesting that if a husband/wife couple come together and the dude hugs her I should run up, push them apart, and then threaten him for being gropey?

Do people on here even leave the house? They've really out of touch with reality.

No, you will ask politely. It's 100% socially acceptable to ask about how people are connected or know each other.

If people get weird about it, apologize. "Sorry, I was just worried for a second that you were, like, groping her!" Laugh it off. Women are likely to respect you for the fact that you're even aware that this is a problem.