(Don't blame me for the title of the thread. It's the actual title of the article)
http://www.theregister.co.uk/2004/12...ility_laptops/

Men who use laptops could be risking their fertility, a US study warns. Heat from the processor can cause the temperature of the testes to rise almost three degrees, more than enough to damage sperm, the research reveals.
Researchers at the State University of New York at Stony Brook have warned men to be careful about using notebook computers on their laps.