No need to say, I'm in the third row.
Fine lines - what a ridiculous term, indeed. I get the point, fine as the opposite to deep, and synonym to delicate, but - seriously - is there anything fine about them? Really?
I wonder how it all happened, the invention of this term. There might have been some lady, well-positioned in the society, who happened to look in her mirror (and I believe there were not so many of these floating around anyway), while she was preparing for some royal ceremony she was inevitably invited for. And she said something like: 'Oh, my forehead, there are these... lines...'. And then, one of her maids said something similar to: 'oh, no, milady/lady/countesse (whatever), they are fine, really'.
And, there you go. The hastily given reply became a notion. Inappropriate, frustrating, and economical with the truth.