No force and no sustaining of sound. Breath will just come in. FM felt that WAs are an important basis of speaking, breathing, and eating. There isn't a single cell of the body that is not improved by breathing more efficiently. Don't force anything ever.
Hands are the most potent stimulus there is.
It's just not a reliable guide. FM said you can't help feeling. OK to be wrong. To be aware of our emotional habits because that's where the trouble comes from. Feeling becomes re-educated.