Curious.

What are you 'doing' when practicing the Chi Sau?

Are you practicing Sticky Hands?
Definition:a : adhesive b (1) : viscous, gluey (2) : coated with a sticky substance

Or are you practicing Sticking Hands?
Definition: to hit or propel (as a hockey puck) with a stick (ergo: to stick an animal to death)

..something to think about...