Why does sex not become fun anymore after having sex too much?

What is an important step to prove something is valid or not? determining the reliability observing research testing

What else happens in your cadriovascular in resonse to your sypathetic nervouse system?

If a social worker goes around boasting to clients and co workers, it may make the listener feel inferior, judged, maybe insignificant how do you feel when someone is boastful and self absorbed when providing you a professional service? why?