I'm not in agreement with an editor. It's a small thing, but before I demand my way I should, of course, be sure I'm right. And I've thought about this enough that I've managed to thoroughly confuse myself.
The original sentence, with a noun change to make it suitable for all ages:
He kissed each finger, flicking it with his tongue, leaving it glistening.
The editor would like both uses of it to be changed to them. Yes? No? Reasons?
If it matters, editor is British, I'm American. Nearly all editor's other suggestions will make the manuscript better, as she clearly knows her stuff.