The American Library Association has its list of most frequently challenged books of 2010 out, and And Tango Makes Three topped the list. Tango topped the list from 2006 to 2008, dropping to number two in 2009 (knocked off by Lauren Myracle's Internet Girls series, the same author who was almost dropped by Scholastic for including lesbian parents in another one of her books). The book was published in 2005.
This shows that, once again, mixing children with gay people is a recipe for head explosion. Somehow people have come to believe that heterosexuality, which children are bombarded with daily in all its forms, is not a sexual orientation and has nothing to do with sex. The parents from the Berenstein Bears don't set off alarms, but Tango's parents do. The solution is to perhaps just remind straight people that they can't write heterosexual without "sex."