Been in CA (state) long enough to have gotten the info a resident of CA (country) can use.
There are several different kinds of avocado. Some of them don't do this, but the one you are most likely to encounter where you live is the Hass (often mislabeled "Haas"), which does. A ripe avocado has rough skin which is almost black, and is squishy but not mushy. When looking for one in the store, buy the one that is as close to that as you can find, and leave it on the counter until it matches. Cut it in half lengthwise around the pit, pop the pit out, and get a spoon between the skin and the contents to separate them. The skin should come off readily with little waste. What there is can be incorporated into the rest if one is mashing the avocado.
Avocado picking
There are several different kinds of avocado. Some of them don't do this, but the one you are most likely to encounter where you live is the Hass (often mislabeled "Haas"), which does. A ripe avocado has rough skin which is almost black, and is squishy but not mushy. When looking for one in the store, buy the one that is as close to that as you can find, and leave it on the counter until it matches. Cut it in half lengthwise around the pit, pop the pit out, and get a spoon between the skin and the contents to separate them. The skin should come off readily with little waste. What there is can be incorporated into the rest if one is mashing the avocado.