… in various ways in preparation for sexual activity – in women the Vagina lubricates, the Clitoris swells, the breasts enlarge. In both, heart rate and breathing speed up and there is a feeling of being “turned on”. Without this arousal, sexual activity is possible but tends to be mechanical and without passion – like someone simply going through the motions. It is more likely that lack of arousal leads to other apparent sexual Dysfunction eg painful sex.

Arousal usually …