Before you can disagree, she’s whipped out your erect penis.
“Oh,” she says, “I don’t mean to embarrass you, but I have to tell you that your cock does not meet my initial expectations. Do your male friends know how small your cock is? I’m not sure you’ll be able to satisfy me with that. Your cock had better have other, redeeming qualities, like not cumming until I command it. That will more than make up for your inadequate size.”
You’d say something in reply, but her firm grasp has you under her spell and all you can think is that you have to obey and you can't cum until she permits you to do so.