Sex was completely pleasurable and satisfying until I reached age 40, everything was still normal except that when I would climax there would not be any pleasure, no feeling, no bells and whistles, it was no more wonderful than the relief from a bowl movement. I started doing research on-line and found that some people need thousands of times the minimum daily recommendation of zinc. I researched zinc toxicity and each day doubled the amount of zinc that I took, and then masturbated the next morning. On the 5th day I had some feeling in my penis and there was some pleasure at climax. By the 10th day I was very close to what I had remembered a climax to be. By the 14th day I was taking close to 3000% or over 500mg of zinc and I had my first climax that was fully pleasurable and satisfying in 5 years. I continue to take these huge amounts of zinc and after 3 years I still do not have any symptoms of zinc toxicity. I hope this helps.