A few years back, I had a procedure that involved twilight sedation. That means you're aware of the experience while it's happening, but have no memory of it af

A few years back, I had a procedure that involved twilight sedation. That means you're aware of the experience while it's happening, but have no memory of it afterwards. I thought about this exact thought experiment constantly leading up to the day of the procedure. It's a fascinating philosophical question. Did I experience the pain of the procedure? A past me before the procedure agreed to commit some future me to pain. During the procedure, that me then certainly experienced pain. But the hypnotic drug washed that memory away leaving a third me that had the benefits of the procedure but no memory of the pain. So what is the moral calculus to perform when signing your future self up to pain that your future future self will forget?