The Fet Quartet: He has to swallow everything

Today my slave will earn a gold medal, if he is able to be a fully functioning human to 4 ladies: Miss Lith, Yara, Anja Black & Miss Medea. All 4 of us were holding in for the last 24 hours, because we don´t want this challenge to be easy for him... We begin my verbally humiliating him as our toilet, then the first part of the exam begins...