Habits like this do not necessarily have a specific cause, but are merely unique traits that come naturally to specific people.
There are several, but the most commonly known is Parkinson's Disease.
When two fingers are held together, it can symbolize unity, connection, or agreement between two people or things.
Your fingers have friction ridges so that we can grab or catch or even hold things with our fingers. If we did not have these friction ridges then probably we wouldn't be able to hold things without the help of our fingers.
Pottential Difference between two things.
your fingers!
your fingers and toes.
Some examples of things that come in groups of five include fingers on a human hand, petals on certain flowers, and points on a star.
To pick things up, to grab things, to feel, ...
Fingerprints are left behind when people touch things due to the sweat and oils present on the ridges of their fingers. These residues get transferred onto surfaces, creating a pattern unique to each individual.
Yes...
your fingers and toes.
Fingerprints developed to help our ancestors grip things more easily. Genetic factors and the position of a baby in the womb determine how fingerprints will develop.