I took a test today, after having been absent for a week, and studying for an hour.
I got a higher grade on that test than a friend of mine who had never been absent and had studied quite a lot.
I opted to subtly not tell him my score.
He assumed this would be because I was ashamed of my low score, and didn't want him to know how badly I had done.
I actually did it because I thought he would be mildly upset by the idea that I did better than him with far less work.
Always keep in mind other peoples opinions, and perspectives.
Especially their assumptions.