Kissing the Keys
In Piano and Song: How to Teach, How to Learn, and How to Form a Judgment of Musical Performances, the author Friedrich Wieck, going under the name Dominie, emphasizes the importance of touching keys correctly. An incorrect touch, Dominie tells his student:
He continues: Although this book was published 144 years ago and written in a hilariously antiquated style, it is timely advice for me at this early stage of my learning. When I practice, my fingers on the left hand feel unsure. My right hand contorts to play the chords and I rarely get a clean sound. When I see others play the piano, their fingers look relaxed and gently kiss the keys.
I'm working on relaxing though, and "drawing the tone out of the keys". Whatever that means.