What are the purposes and benefits from hidden earpiece usage?

Every student knows how painful or tedious can be exams, tests or other academic tortures. As a rule they require long preparation and oblidge students to learn by heart a lot of information, which sometimes too impractical and remote from the real life. So, it's rather understandable why lots of pupils and students use hidden earpieces to overcome these difficulties and in the meantime succeed in studying.

In addition to purely academic usage, hidden earpiece could aid business people during various negotiations, conferences and business meetings. Indeed, sometimes you may be forced to refer to relevant information and not to be suspected of incompetence by business partners. The most hadful way to do so - to buy and use hidden earpiece. Moreover, its range of applicability is not resticted to described above cases - it could be used by car drivers, bodyguards, office workers and so on. Or in any case when someone need to negotiate secretly with partners.