I was at a parfumer yesterday who sells brushes and he showed another customer and to me another time how to make lather in/on his hand using only back and forth motions. Also on your face, he said, use no circular motions because they will destroy your brush. I remember my first brush from 20 years ago, wich is still there, where all the hairs in the center are broken away, leaving a hole. Is this due to the poor quality (cheap) brush or the effect of swirling on my face? What are your experiences with this matter?