IRL it'd be a huge red flag of mental health, drug abuse or some kind of distress. Whatever the reason, it wouldn't be sexy.
Are you stating women who flash their breasts IRL are a red flag?
To me? Heck yes!
I believe it's unthinkable for the women here in my part of China too. Heh, I'll ask around the office, see what they think. This is gonna be good.
