Wot no hair? Wot no balls?
The models depicted have no body hair, or even head hair, at all!
What is this supposed to mean?
Head hair (length, style, etc.) is a cultural matter.
Facial hair (beard, moustache, etc.) is cultural, but also genetic (e.g., native Americans and South American tribes do not grow facial hair). Chest hair and some other bits of hair vary between races.
I *think* we (common humanity) all have armpit hair and pubic hair (apart from young ladies currently living in London, who have neither, apart from, possibly, a "Brazilian landing strip").
If the NHS is so tortured about showing a realistic depiction of the human genitalia in what is supposed to be an anatomically correct diagram, why don't they just cover everyone's embarrassment with a merkin*?
This is utterly pathetic and contemptible. If they really want a good representative example of the English male genitalia, contact my manager.
(* Look it up on Google, you lazy sods! :-)