In an effort to save "vulnerable" koalas from extinction, boffins have started a full-on in vitro program for them replete with sperm bank. Three test-tube tots have been produced already.
Okay, this sounds like a good idea now. But not down the track. When these bubs become gum-chewing teens they'll be stricken with angst about their identity, up-sticks and go looking for their biological fathers. Think of the effect on the ecosystem!