You will need plenty of tuna for this task as this is one of those of those tasks that you only keep the cube for as long as you continue the task. You wont be sleeping in a wet bed, like sleeping with the fishes would suggest you will however be sleeping in a bed covered in fish.
I can assure you it will really stink if you through with task, do you think you can cope with sleeping in a bed filled with the stench of tuna. Maybe when it's fresh but what if you still don't get to cum soon and it's rotting for days?