Re: Nicotine addiction?
"Or, just a stray stupid thought, it could indicate that rats, like people, are more likely to ingest nicotine when awake?"
Of course all animals need to be awake in order to consciously decide to do anything! The point I was making is that whilst they initially only self administer during their normal waking hours as would be expected with something that is just pleasurable to them, that gradually changes over time so that they actually wake during their downtime to S.A. - suggesting that a physical withdrawal response is disturbing their natural circadian rhythm. Did you actually read the report before coming to your conclusion? If not I demand your boffin icon be retracted.