>>38338132I didn't use lube and did it around 3 times/day, it got progressively worse over the years
By myself, I mostly subconsciously figured out how to get myself off reasonably quickly, but once it was someone else who didn't have the muscle memory of where/how to touch, I realized how little I was feeling
Just be careful anon, building up the sensitivity once it's damaged is a long process
Doing it less often and/or with lube couldn't hurt 