What felt foreign to you as a child but now you have mastered it?

For me it’s sex, filling in eyebrows, picking out suits, and working with systems professionally. When i was a kid these are things that felt super hard and scary for me and i spent a great amount of years stressing over it and thinking i would not be able to do it. Then i started doing it as an adult and it doesn’t feel that hard or scary. What felt foreign to you as a child but now you have mastered it?

What felt foreign to you as a child but now you have mastered it?
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