When a woman tells you her age, do you act surprised or nonchalant?
If you act surprised, she may find it insulting, as if you're saying "God, I can't believe how OLD you are!" instead of what you really mean, which is "God, I can't believe how young you look for your age!"
If you act nonchalant, she may find it insulting, as if you're saying, "Yeah...that sounds about right."
Also, what is the approximate age when you should never ask? Because if a girl's in her 20s, this is important information for getting to know her. Is she just out of high school and starting her college life, or is she deep into a career, possibly married and divorced already? I want to know these things, but I always feel vaguely inappropriate asking due to the silly social idea that women are supposed to be young, young, young, and then abruptly die of old age.