I have a girl that Ive started spending some time with, when she's sitting in my lap or in my arms - she starts to speak in a very child like manner. This only happens if there is no one around and she feels we are alone.

I assume its something to do with her feeling very relaxed and/or something to do with pleasure chemicals in her brain. I was just wondering if the community has a term for this and if its something I should mirror or not and what are the thoughts on this?

thanks.