If you fornicated in the past just repent of it, I dont understand why some professed christians think it was a great thing and even encourgae others to do so, the ones I know regret their past behaviour and wouldnt ever do it again. Some are dealing with the consequences of it in their own lives, it truly does make a mess of it...when christians who never fornicated have an easier time of it. However if youve sinned much, you will be forgiven much, this much I know! Mary Magdalen knew.
I am quite alarmed when I read on these forums for example people saying how lust is a normal desire, It actually isnt! God showed me it wasnt!
If someone says within marriage you can be free to indulge in all sorts of sexual immorality simply cos you now married, well think again. If someone says within marriage you can continue to think like you a porn star I would go um Noooo. Being married means you belong to that ONE person and nobody else and also doesnt mean you can treat them degradingly or selfishly for your own gratification either.