It's common knowledge that your morning cup of coffee, with that dose of caffeine, helps you wake up. Therefore, it is not a big stretch to think that coffee also helps us think through decisions, because we are more awake to do so. However, that cup of coffee does so much more than that. In fact, it just might help you behave in more ethical ways.
Everyone, at some point during his or her career, will experience the slightly guilty feeling of looking for work while still employed elsewhere. It's always preferable to search for a job while employed in order to maintain some level of financial and professional security — not to mention, it looks better to recruiters. Still, it's a difficult balancing act, especially when it gets to the interview stage.