kids are gross and so are their parents

I attend a class in which there are toddlers, parents and one friendly, affectionate teacher.  There is a kid that digs deep inside his nose and gets boogers and eats them.  I’m talking, tooth under nail to get the last speck, booger-eating.  The mother just looks at him shaking her head.  Meanwhile, the teacher reaches out her hand for a ‘high five’.  This happens repeatedly.