If you're going to be this insistent, I think I deserve to know why...?
[Pretty much everything about this is summarized with "I don't know why you think this will work", up to and including doing all of this and then telling him that you're just not going to explain why.]
no subject
[Pretty much everything about this is summarized with "I don't know why you think this will work", up to and including doing all of this and then telling him that you're just not going to explain why.]