ANSWER:
This is not normal at all and I believe that you need to analyze your life as you are in great danger.
You must see what drives you to such a sin and stop it. Most likely you are also addicted to watching movies that make you fantasize haram things or you watch porn. You must take this out and eliminate it from your home.
You must also see how your relationship with your wife is going, as in, if you don’t sleep with her except once or twice a week, then you have a problem!
I personally believe that you need councelling with a sheikh but you also need to check with a psychiatrist as what you are doing is not at all normal.