The only thing about His forehead work that I did not like the sound of, was, that as a matter of course, He permanently and intentionally blocks the sinuses with bits of bone. I find this very strange, but I'm sure He has His reasons, although I would like to know what those reasons are........as a matter of curiosity of course.
On the "Guys" calling topic, I've always called My children, [2 boys and 1 girl] and wife, and other people, "Guys", even though there maybe Girls amongst them. I am mindful not to do this outside of the U.K.