It seems to me that the default answer is no. So if you ask someone you haven't gone that far yet after just a bit of kissing you would most likely get a no (which probably highly depends on the women and how she feels judged if she openly admits to her desires), but minutes later you might get a yes. A tug of war, a game. There is certainly a difference between a women laughingly saying "no", then taking her bra off anyway, and a women pushing herself in the corner screaming "no!", but what comes to mind if these men are asked? Really the latter?
I've had the former happen rather often, although my experience is limited to younger women. I would probably answer yes without hesitation, adding myself to the group of people this articles writer is dumbfounded by.
Reflecting on that I'm rather confused.