The marriage Bdsm taboo

Hi everyone. I was asked yesterday by a religious kinkster... (By the way I am also religious)  how can he tell his wife what he really likes to do in terms of fetish.... My answer was JUST DO IT!! Just tell her how much you love her and how much you want to share that part of your life that you been hiding.. He said  " but my wife would look at me like I'm crazy" !!  I told him if she truly loves you and wants to share a whole life with you and create new possibilities of a healthy long lasting intimate relationship she would understand and do further research to connect with that kinkster side of your being that she has been taken away for the duration of your marriage.