Daycare Dilemma

Yesterday my niece got a call from the daycare. Don't you hate when the phone rings and the caller id says "daycare?" Do you answer or pretend you aren't home? Do you automatically think, "uh oh, sick kid" or "uh oh, they want cupcakes" or "uh oh, kid in trouble!"? It seems that sweet, beautiful, girly little Ella was sitting on the toilet (she's 2 1/2) which is a good thing since potty training obviously is working. She sat a long time. Apparently a really long time. Friend and fellow classmate needed to sit on the toilet too. A scuffle ensued. Friend was bitten (didn't break the skin but caused a bruise) by sweet, beautiful, girly little Ella. It is not ok to bite a friend when he/she is shoving you off the toilet!

Uh, exactly when is it ok to bite a friend? What is ok to do when a friend shoves you off the toilet? Did Emily Post give any suggestions in her book? Is there any gracious way to step aside when your panties are down around your ankles? My grandmotherly skills have abondoned me on this one.