Good news for all the people who dreamed that one day they'd be able to grow sexual organs on their heads.
Female snails in Perth Australia have been found to grow penises on their heads. The mutation comes from exposure to the chemical TBT. The condition is known as "imposex" and in some areas with a high rate of TBT the rate of imposex was 100%.
Just wait til TBT gets into the drinking water and humans start growing sexual organs from their heads.