I trust you are asking because you really wonder about this and are not an anti-circ fanatic dreaming up crazy things. I am cut and all of my friends are too, I have never heard any one of them "moisturizing" their dicks other than occasional lube for JO, But even then most of us prefer dry.
Since you were recently circumcised, follow your Doctors advise and you may wish to use something. As to the desensitizing issue, think of it like the First Law of Thermodynamics: Energy can be changed from one form to another, but it cannot be created or destroyed. You may lose that uncomfortable, numbing hyper-sensitivity that many uncuts experience but you will continue to have the same quality of orgasm as always, the journey to get there may change but nothing is lost.