Orgasm & Everything You Should Know About It! Orgasm is that feeling of intense pleasure and discharge of erotic tension when having sexual intercourse. The words 'climaxing' or 'coming' can be used interchangeably when describing orgasm. There is a whole lot of changes that are experienced by the human body both physically and emotionally whilst experiencing an orgasm, such as increased heart rate and breathing, series of muscle contractions in the lower pelvis, sex organs and anal region, with the release of hormones such as endorphins & oxytocin there is a relaxing effect too.