Female led relationships discussion

Hey everybody., I’m interested in your opinion… If your dominant wants you something to do (doesn’t matter what or in which context), and you ask why, should the answer ‘because I say so’ be enough as justification? And second question: if your dominant wants you something to do (doesn’t matter what or in which context), and you ask why, is ‘because I say so’ a good answer or is it rather an excuse for not having a better answer just in that moment?