From RED DWARF:
EPIDEME
*Dave*... let's run down the rules. If you win: *you* get to live; if I win: you get to die, and I take all your knowledge then I kill you...
LISTER
What? You absorb knowledge from every person you kill?
EPIDEME
So, as you can appreciate, killing you ain't exactly a career highlight...
No offence, but when you're a virus there's not much call for knowing how to open a lager bottle with your *anus*.