Strange acrobatics

When I was very young, I learned the skills of walking on eggshells.

I got them from my mom, for sure, because she was a master of such craft.

I practiced them for a while, and was quite good at.

They required steady concentration that would drain me at times.

Then, due to change of terrain, I ceased to exercise them. 

So, once known by heart, they were almost forgotten...

But I've grown lighter and lighter, so they are not needed anyway, nor missed...