What Wisconsin said--a hundred percent. You told him you'd have to "think about it." What that tells him is that what he said was working, he just needs to be more CONVINCING next time. And believe me, he'll find a way to be more convincing. You have to be prepared, because that's what it will be--a sales job.
I wouldn't even agree to discuss it again. It only exposes you to more pressure and manipulation. You know right now he will do it, but it's easy to weaken in the face of good manipulation. Don't give him the chance.