I think it just happened really gradually between like 6-years-old and eight-years-old. My dad taught me. I went through a phase one year where all I wanted to do was swim, and I used to argue when someone told me I had to do something else. IIRC, that's what's happening here https://imgur.com/a/rDu9bOd I'm big bitching about having to get out of my grandmother's pool. But soon after that phase, I went through a long phase where you couldn't have PAID me to go swimming.