Noun version of courteous. The act of having consideration for another person or being; to include other being's needs or wants into a plan or schedule
So me and Steve were hanging out drinking some beer and out of nowhere there was a knock at the door, do you know who it was? It was Joe, we haven't seen him sense high school.
When you are watching a movie with a bro and a sad part comes up. Your bro begins to cry so you throw your drink in their face so no one can see that he is crying.
When a friend of the opposite sex (for heterosexuals) wears something slightly revealing or otherwise shows a bit of skin, and it would be rude or confidence destroying not to take a quick glance.