I guess for me I've always considered a milf more in terms of she looks like a mom, rather than she is a mom. I mean, if someone didn't tell you these chicks were moms, would you still consider them milfs? And hasn't Nina Hartley been featured in Milf movies? As far as I know, she doesn't have a kid, or does she?

I think when the term first came out it simply had the word mom in it because chances were, you were telling your friend his mom was hot enough to fuck- which set her apart from other women her age. Nowdays, it a little pointless to say milf since any whore, regardless of age will get fucked. I mean, if a whore is 80 and has a kid with no kids, then she's technically still a milf, but by my definition, she immediately becomes a gilf.

And by the way, this is one hot 80 year old we're talking about here, not your typical run of the mill geriatric.
_________________________
I hit her with the hammer on top of the head. She made a lot of noise and kept on making noise, so I hit her again.