[ExI] you cn't always get what you wnt

[Damien Broderick]

The odd thing is that this idea (sans the wnt element) has been a 
commonplace of sf for at least half a century, and very probably much 
longer. It's the basis of James Gunn's THE IMMORTALS [1958] (I think 
his mutant on the run has a hematopoietic SNP), and of Norman 
Spinrad's once notorious BUG JACK BARRON, also infamous for its many 
scenes of fellatio (a sort of vitalistic vampiric subtext, doncha 
know). And I seem to recall that the non-Howard family humans in 
Heinlein's Future History eventually gain equal longevity by sprucing 
up their blood.

Damien Broderick