"a plague of tics" Sedaris Analysis

After reading this story I got a little confused.  At first all of the rituals the girl was explaining reminded me of having a severe case of OCD but when she was describing how she had to kiss things and lick them did not remind me of OCD at all.  Can licking and kissing things be a ritual for a person who has OCD? I don't know, but overall I thought this story was interesting.  I couldn't even imagine having to count the steps you take or having a voice in your head asking you if you forgot to lick the light switch or kiss the newspaper.  Another part of this story I thought was strange was the girls mother.  The girls mother almost seemed like she enjoyed watching her daughter do these bizarre rituals and the part I thought was the strangest was when a teacher would try and schedule a conference with her mom, all her mom would do is force alcohol down her teachers throats.  I was sure what was wrong with the girls mother either.