Nerve damage anyone ?

Is it possible that me penis have coused a nerve damage from the streaching with my hands and use of the Lenght Master. I am asking this becuse since i started the stretching i can not feel this awsome feeling when i am fucking my girlfriend ( this feeling is like some times when i am very hard i get this awsome pleasure feeling through my dick ). I do not whant do talk any negative things about the LM or anything i just had too ask this question.