Michael Wasserman of the University of California has recently undertaken a study which he believes shows vegetarians to have better sex lives than carnivores.
The study was conducted for over a year on monkeys where their diet was strictly veggie. Sex as well as stress hormones were seen to be heightened by the team during the trial.
Leaves from the Millettia dura tree were the main staple of the diet which contain high levels of soy. Wasserman says there is merit to the study with support coming somewhat humorously I would imagine from PETA with an associate suggesting vegans have the stamina to party all night long.
Here is a little song which this article reminded me of