I never did this when I raised kundalini, and I've done it hundreds of times.

Tensing the perineum, and sitting on a knotted towel to produce sensation in the same area, are ways of focusing body awareness in the perineum.

However, once you know what body awareness is and have learned how to use it - 30 minutes is all it takes - you no longer need to do those things.

Everything needed for raising kundalini can be done with body awareness tactile imaging, which is very simple to do.

robert