Practicing Bunkai | General Discussion | Forum

In the Dojo we sometimes break down a Kata and go through it's applications. The hard bit however is to make these applications become second nature and use them in Kumite. How do you train Bunkai out of the Dojo, keeping in mind you should really train this with an opponent? Do you force your son/daughter, brother/sister or poor parent to play the willing target, do you have a buddy to practice with and build up speed in the applications?