Weak Pinky fingers!?!?

Question

For some reason, my pinky fingers seem to be weak (even though they would seem to be due to the lack of use). How do I get them stronger, especially for piano. Also, when you bend your fingers to make a fist, why do pinky fingers bend in on an angle, and not straight like the other fingers?

Another thing, whenever I play the piano or type, my pinky fingers also automatically want to bend up.

Answer 1

Use rubber bands by stretching different thicknesses with by looping it around your thumb and pulling with your pinky.