Researchers at the University of Bari, Italy, studied how MDMA (ecstasy) and loud music impact the sexual activity of rats . They report their results in the scientific journal European Reiew for Medical and Pharmacological Sciences. According to their experiments, MDMA impaired the rats' sexual behavior while loud music seemed to increase the number of rats getting it on. From the paper abstract:- However, combined treatment of MDMA and music stimulation did not fully
restore normal sexual behavior as the animals reaching ejaculation
still showed a marked reduction of copulatory efficiency. These
findings demonstrate that the systemic administration of a single low
dose of MDMA, alone or in combination with loud music, which is
commonly present in certain environments such as rave parties, notably
impairs copulatory activity of male rats. – [via Boing Boing ]

Loud pop music in bars makes people drink more and down it more quickly, a study in France has shown.

Researchers watched young men who had ordered a glass of beer on a Saturday evening in two unnamed bars in western France. The drinkers were unaware they were being watched by the researchers, who had programmed the sound system to select randomly either a normal level of 72 decibels or a loud level of 88dB.

Nicolas Guéguen, Professor of Behavioural sciences at the Université de Bretagne-Sud, led the study. He said: “Previous research has shown that fast music can cause fast drinking, and that music versus no music can cause a person to spend more time in a bar. This is the first time that an experimental approach in a real context found the effects of loud music on alcohol consumption.”  [read more @ Times Online]