Not talking about birds nor is bozo.
These people are mentally sick, they are born either a male or a female and if they think they should be the opposite sex then so be it but it doe snot take away they have mental issues as does those who support this perversion.
"A chimera (also spelled chimaera) (from the creature Chimera in Greek mythology) is a single organism composed of genetically distinct cells. This can result in male and female organs, two different blood types, or subtle variations in form.[1] " http://en.wikipedia.org/wiki/Chimera_%28genetics%29