Sensory adaptation is the decrease in reactivity to a stimulus after continuous exposure to it. Additionally, sensory adaptation can help us liberate ourselves from stimuli in our environment. However, on the flip side, that can also be the negative. Why, may you ask, wel,l it is because our body naturally reacts to anything. So, if your body has a negative reaction to something, it is trying to tell you that its harmful. For example, let's say you are given two separate bottles. The first bottle smells wonderful (like the smell of spruce trees or flowers)! Then you are given the second bottle, and it smells of chemicals. Right away, your body will react. Now, if you put yourself into an environment consistently that smells of that, your body will eventually be prone to the smell and not give you any warning that that is harmful.
I hope this helps!