Frustration is wanting to do multiple things at once that each exclude you from being able to do any of the others at the same time.
Wet nails and knitting don't mix.
Wet nails and spinning REALLY don't mix.
Spinning and reading don't mix.
Reading and candle making don't mix.
Cats and any of the above don't mix. (Especially with the hot wax on the stove while nails are wet)