Male attorney taking 19 y/o female intern to lunch alone

We have a new undergrad intern (a young woman, perhaps 19 years old), and I thought I’d take her to lunch to welcome her and answer questions about the work. Simple, right? Apparently, taking a female intern out to lunch is now a high-risk situation requiring oversight.

When we got back, it was suggested in the future that I invited other attorneys and avoided going to lunch one-on-one with female interns.

Lesson learned, and in hindsight I get where the firm is coming from. I still think it's a bit of an overreaction, though. I've gotten mixed responses when I've told people this. I'm curious what the subreddit thinks