End of the binkie (MAYBE)

I am trying to decide how to take Justin's binkie. Can anyone give me some input on the best way to do this. My husband and I are at odds about how it should be done. He wants to do it slowly ( a little at a time) and I want to just take them all at once (throw them in the trash and that is that). I really don't want to traumatize him for life but he is going to be 4 in November.

So please give me some ideas.
Jenifer