They ask you, 'suppose your son was a homosexual, what would you do?' Now this is what philosophers call a reductio ad absurdum. Suppose your son was a dog-man? Of course he cannot be my son if he is a homosexual, or a dog-man. He could be my anything else, but not a son. He cannot be anybody's son. Sons don't marry other men, nor do they allow other men to marry them.