Pleasure is cause by endorphins, released through both sports and sex.IcePho3nix said:I think by pleasure he meant sex drive. Nice try though.
Not sure how reliable this source is but:
http://organizedwisdom.com/Endorphins_and_Sex
And quoting wiki ('Pleasure' page):
'Certain chemicals are known to stimulate the pleasure centers of the brain. These include dopamine[7] and various endorphins. It has been specifically stated that physical exertion can release endorphines in what is called the runner's high, and equally it has been found that chocolate and certain spices, such as from the family of the chilli, can release or cause to be released similar psychoactive chemicals to those released during sexual acts.'
Edit: Realised last sentence wasn't quite right. Should have read: The pleasure from sports is similar to the from sex.