After my wife heard some college guys call her a MILF, I had to explain what it meant. Her reaction was, "That's good, I guess."

I dunno, man. having more than a single dimension of appreciation seems both exhausting and potentially confusing as to what you want from her/for her.
la donna e mobile.

Perhaps because they generally do not like being objectified as a sex toy to begin with, and in addition are sensitive about aging (which treats most women worse than most men) as well as the term "mother" triggering a maternal morality role society has imprinted in most? Just guessing.

Because they think I’m old enough to be their mother when they might only be slightly more than 10 years younger than me.

Maybe because they are moms!!

because they don't understand acronyms

they probably saw American Pie

Cuz pop out one kid and you're labeled for life!

You probably don't have a big enough D for the F part so they're only offended when you say it.

Because it is a p0rn0graphic terminology.