Arousal »
… a number of reasons such as;
Imbalanced Hormone levels, particularly with regard to Testosterone which is believed to figure significantly in arousal in both men and women.
A reduction in response capability induced by the natural ageing process.
Illness, surgery or injury which results in significant pain, fatigue, disfigurement, etc.
Medication used in the treatment of illness.
Misuse of “recreational” drugs such as alcohol or “hard” drugs. …