:7 is an all-purpose smiley! You can use :7 to denote happy and laughing as well as the rarely-used sad, angry, or any of the plethora of human emotions!
:7 is the intellectual, abstract, ambiguous smiley! Is it a guy smiling strangely? Is he smoking a pipe? Is he a bird? Who knows?!
:7 has been proven to attract ladies and make them want to have sex with you 84% more successfully than any other smiley in existance. Can you really afford to ignore these statistics?
:7 is fantastic, orgasmic, and CYTOPLASMIC! Start using it... today!
Reznov: I just sacrificed myself and the lives of half of the people in Vorkuta for some American to escape. How about you comrade?
Ghost: Cupcake Penis :7
Reznov: I'm going to go get hung now, bye. -.-