This subject was covered in an early episode of the UK tv comedy series "Coupling".
What you need is a "porn buddy". Somebody you trust totally, who you give your key to, who will go to your home and remove all your porn in the event of your death.
Having heard the explanation the female character, Susan, seems amazed that this pact had been made to destroy all her prospective boyfriends porn, to which the guy replied...
"Destroy??? I said remove. Your best friend's dead, but there's an upside, you've got all his porn!"
