I retired after 42 yrs (from a parochial school).  I can say we NEVER went "there".  I also taught sex ed to my 5th graders.  I allowed the kids to ask me any questions because I told them it was important to have correct information.  They could write it down and put it in a box for me to address later to the class (so no one would know who asked).  They had good, age appropriate questions.  I always encouraged them to talk with their parents.  I told them to talk to which ever one they felt more comfortable with regarding their questions.  Most were more comfortable with "mom".  We did discuss homosexuality etc.  I did explain that one of the reasons for "marriage" (in the Catholic Church) was to create a new life (baby).  We discussed why 2 males /2 females together could not create a new life.  We didn't condemn alternate life choices etc.   ok...end of rant.