A long, long time ago I really wanted to learn how to do side splits like Jean Claude Van Damme for the purpose of doing roundhouse kicks. The irony is that I am very flexible in almost all directions except side split. I stretch almost daily, and while there is some progress, I will probably never get there, or even close. Good thing it's not required for ninpo. What I like most is rolling, breakfalls, tai sabaki and locks.