When you know you are getting it right with your co-workers...
My new helper likes beer. I like beer. I mentioned something about a local place that has a weirdly nice pumpkin beer on tap. Vague talk was made about catching up after work for a weirdly nice pumpkin beer. My helper left for the day, and two hours later when I finished, I texted her to say that I'm walking home now and might stop off for one of those pumpkin beers and if you're about feel free to join me, cool if not.
Her reply was "I am coming! I will be there in 13 minutes!"
It was a lovely drink and conversation with a new friend.
And now she wants to share her comfort package that her mother sent from France with The Dreaded One and Me and her banjo teacher (a former member of band The Triffids) because she thinks we will get along.
Random human interaction. When it works, it's pretty special.