Quote - They cited educational purposes for the lack of genitalia. This probably means marketing to grade schools  or middle schools (5 to 13 year olds for those in different school systems) and such. While anitomically correct education can have benifits, in the US at least, full frontal nudity for children is still generally frowned on. In addition many schools have computers the kids can use with minimal supervision. (a teacher in the room but not constantly looking over the kids shoulders) Allowing kids to use computers with nude models would certainly be considered inappropriate. Also, the school computers have filter which block sites and programs that are inappropriate and that would make it hard for teachers to access the content on that site.

Speaking as a former high school teacher with a classroom that had a computer at every student desk, I can tell you that you are absolutely, 100% corrrect about this, and it applies to High School as well as the lower grades. Parents would freak out if we had that on those computers. It would not fly. 

"People who attempt define what art is or is not, are not artists"---Luminescence