French artist Philippe Meste wants sperm. His artwork Spermcube is a transparant cube of one square meter, which can contain 1000 liter (or 264 US gal) of sperm.
Meste asks all men all over the world to donate. A donor kit can be requested through the website. You can also become a Spermcube shareholder and make profit from the sales of the Spermcube.