They can want to know whatever they want to know, they can even claim to need to know whatever they want to claim as well, it's their right to happiness after all, if they want to know about your socks and all these sock details, it's their right to want that, and they can even ask you these things. They can also DEMAND answers from you, or make any demands they want, as you can of them, reasonable or not because people have the right to ask whatever questions they want and demand whatever answers or actions equally under whatever absurdity or reason, it's people's right to contract with others.

Fulfilling these demands is paramount to a wet ink signed contract over these demands and all implied contracts though, caveat emptor, and there's a million and one ways to say no, No thank you