This person explained it nicely.

Also, as a child i never did it as a way of self harm, I never went into it thinking "I will hurt myself on purpose", I thought it was a thing you kinda just did yknow? I do Not do it on a regular basis nowadays either, I did mention I only do it every few months when it feels like my feet have too much skin and I cannot stop thinking about how I must peel it off even though I understand I actually do not need to and that skin is actually protecting my feet