It doesn’t happen often but- occasionally people will ask if a guy I’m dating is my brother. They’ll ask us if we are brother and sister when we’re

casually hanging out together. We laugh and say no we’re not. These people asking are people we don’t rly know. In more recent times we’ve messed with them saying “yes we are” and give each other side-eyed smiles lol…. But I’m wondering, should this be a concern? Do you think people are asking to be offensive? Or are people observing a dynamic between us that we aren’t noticing??