A mind-bending drug for naughty pets, about to go on sale, can cause spontaneous orgasms in some people.
The prescription drug Clomicalm has been approved for use on cats and dogs in the United States and Europe.
It is used to treat a clinical condition known as separation anxiety, which causes home-alone pets to chew furniture and urinate on the floor.
However, the drug, known by the clinical name of clomipramine, has been documented to cause spontaneous orgasms in both men and women.
Four mental patients mentioned in a 1983 paper in the Canadian Journal of Psychiatry said that they could induce orgasms by yawning after taking the drug.
Clomipramine has been used since the 1960s to treat depression and obsessive-compulsive disorder in humans; it is an approved drug for prescription to humans in Hong Kong.