'No I'm not. What I'm trying to tell you is that there are men who are possessed by an urge so strong to do some particular thing that they can't help themselves, they've got to do it. They're prepared to sacrifice everything to satisfy their yearning.'
'Even the people who love them?'
'Is that anything more than plain selfishness?'
'I wouldn't know,' I smiled.
-W. Somerset Maughm, "The Razor's Edge"