Definition of orgasm. : intense or paroxysmal excitement; especially : the rapid pleasurable release of neuromuscular tensions at the height of sexual arousal that is usually accompanied by the ejaculation of semen in the male and by vaginal contractions in the female.
On average, the subjects burned 5.3 calories per minute. A second trial, this time commissioned (i.e. paid for) by the Les Mills Group (the people who invented Body Pump), compared a Body Pump session lasting 57 minutes with 60 minutes of continuous cycling.
As with everything, it depends on how much effort you put into it. According to my HRM, I burn (at my current weight) burn somewhere between 400-550 calories in a class. The class is an hour class, but the actual excercise time is around 50-55 minutes.