Hanging fetish

I have a lovely boyfriend, quite older than me, and in every sense more experienced in sex than me. He is mad about my neck, he caresses and kisses it all the time, and openly he tells me he has a huge fetish for a girls neck.In the start of our relationship he just put his fingers around my neck and strangled me very lightly. Sooner he started to use belts, scarfs, nylon stockings and pntyhose for strangling me, and it became harder for me to breathe as he began to strangle me harder. and suddently I achieved an orgasm that strong that I have never experienced before in my life. After this he started to tie my hands and ankles, and place me on a stool, to put a rope with a noose around my neck, and pull the rope til I stand on tip toes. He never tie the rope to anything solid, just holding the rope with his hands, but it feels so terribly arousing to me when playing like this...especially if he covers my head with the linen cover from a pillow. Am I a pervert? will it end up wrong some day? what is your opinion about all this?