in reply to Sarah Brown

The real answer to those people is, “It doesn’t matter what you think you can tell. If you make a high priority of ruining the lives of people who are just trying to live in peace, you’re a monster and a loser.”

The only person who has a right to ask about someone’s A_AB status is a potential sexual partner.

You’re quite pretty, too. But that’s not relevant to your (valid) point, or mine. Not that you should care about the opinion of J. Random Guy (of a similar age).