Now those smileys might give you a good idea of how happy I could be, right? I realize that texting and instant messaging have inadvertently and so innocuously introduced, by way of 'number of smileys', a way of measuring the moods/emotions of people. Mind you, not just the 'smiley' itself. It's 'the number of smileys'.
Of course, there are words which can depict appropriately the intensity of different emotions but then in a community where English isn't a native language, usage of such vocabulary is rather limited. But with the use of English going really mass, the urge to convey the emotion correctly has resulted in a rather simple solution: the number of smileys.