Is it normal that i salt my penis?

Ok guys, I'll try to get straight to it: I occassionally cut the tip of my penis and put salt on it.

Now, I am a 30-year-old male with a wife and a son. About 3 or 4 years ago I found myself with strange cravings (this was just before my wife and I got married). I felt the urge to taste salt, but not in my mouth--in my penis. I don't know how to explain it, but I had the wildest urges to have salt in my penis--not like the burn, but the taste (even though I clearly can't taste with my penis, but still. I can't explain it). So I tried several ways of getting salt into my penis, including the use of a small funnel, coffee straws, and sometimes just cramming wet clumps of salt into my urethra with my fingers. I soon realized that the best way to get salt IN my penis would be to create open wounds in which I could put salt (this worked out because the salt kept cuts clean but it hurt tremendously). I would cut perpendicular slits on my urethra that I could pour salt onto. I tend to make small enough cuts and abbrasions that there are no scars, but recently I've been making larger cuts and my wife has noticed the scars. I'm beginning to think that this is an unhealthy and abnormal habit.

I'm not a massochist, and I genuinly dislike the pain of cuts and salted wounds on my penis, but no matter how hard I try, I am unable to resist my overwhelming urges. Am I ok? Am I sick? Am I normal?