I think that would be one of the most intense psychological ways to have it done. Be tied down and have a woman put a band on you, then sit there and tease you for as long as she wanted while you begged and begged for her to let your balls go free. The length of time it takes not to mention all the teasing that can be done would be more mentally traumatic than if they were quickly smashed or cut off. Its like the difference between slowly drowning and getting hit by a car.
And I would so let a woman do this to me... its still a fantasy I would love to make a reality.