"Since we started the free distribution of sexual stimulants, our elderly population changed.

They're much happier, " said Joao de Souza Luz, the mayor of Novo Santo Antonio, a small town in the central state of Mato Grosso.

Souza Luz said 68 men over the age of 60 had already signed up for the program, which was approved by the town's legislature and has been dubbed 'Happy Penis' or 'Pinto Alegre' in Portuguese.