What makes you think this would be against the agreement? Is crust a religion? An disability? "Dirty" isn't a protected class.
I've personally experienced that some hosts refuse to rent to unmarried couples. It was inconvenient and silly, but perfectly legal and nearly harmless (unless their actual problem was that only one of us was white, but who can say).
I've personally experienced that some hosts refuse to rent to unmarried couples. It was inconvenient and silly, but perfectly legal and nearly harmless (unless their actual problem was that only one of us was white, but who can say).