I went in with a nice "That is completely untrue. My brother will date anyone, anytime. He does not care about looks at all. Or gender for that matter. Me personally, I care not too much about looks (more about must share interests, like weird obscure films, wine, cooking, baking), except she must take care of herself, be presentable, and not a total slag, and she cannot be fat, although that obviously falls under the taking care of herself part." A nice subtle jab, see if it triggers them.