If you do not want to destroy your marriage and experience life eternal seperated from God then don't do it. In fact, Jesus said just lusting is a sin and just the thought requires repentance. Repentance means to turn from your sin and turn towards God. i suggest you read the bible start in the New Testament Mathew and then keep reading. Then start going to a bible believing church and learn about God.
I tried all the kinky stuff and reaped the consequences. I now attend a bible beleiveing church and have the best marriage imaginable. When we make love it beats the best sex I ever had. In my past marriage we did "everything". Its all empty and will not bring lasting joy. So for the good of your marriage and your soul REPENT!