All the time... it's the daily meet-and-greet script.
And yes, it is also contextual... if my partner asks, she gets a much more genuine answer, even if it's "I can't talk about it right now." She's wise enough to know that when I get ready to talk about it, IF I get ready to talk about it, I will. She's signalling that she's noticed I've got something brewing inside, and she's willing to listen.
Other people may ask in genuine concern, and then I decide whether I can trust them or if I just don't want to get into it.