You've been a good slave but it's time to put you out to pasture. You've outlived your entertainment value and I need to get rid of you to make room for a new, bright and shiny toy! However, since you've been such a dedicated servant, I am inclined to be merciful. I will allow you one last orgasm before taking you out for good. I give you a special serum that will end your existence forever and tell you to stroke. The closer you get to orgasm, the closer you are to reaching your end. When you cum, it will be lights out. What a way to go!