Now, there are a couple of situations here that I am uncertain of, and my only previous knowledge comes from the word of a friend, with no real backup evidence – I just went with it. Let's say it's a 1:2 – 1 hit = 2 points of equipment damage. However when you hit a wall or other object, it does more.
Let's say it's a 1:1 – 1 hit = 1 point of equipment damage. So: when you hit an enemy, it does an amount of damage (or wear) to your equipment. However, the question isn't about those details (though it wouldn't hurt to include them in your answer). Note: Before I start, I don't know the actual figures, but I do know there is a difference. What I actually mean is a bit more specific. Ok, I actually do know what causes equipment wear in Dark Souls.