Why do Cocaine users put coke in their mouths and rub it against their teeth..

United States
October 24, 2008 1:54am CST
after doing a line? ive never done drugs so im clueless.. lol.. but you always see it on tv that a person will do a line or two then take the rest and rub it in their mouths or teeth etc.. what does this do/for?? i know i probably sound TOTALLY stupid lol