That's a great diagram!

I'd personally move the back of the neck to the purple zone - it can be considered intimate touch.

I'd also add feet to the diagram (they're currently in white) and I'd personally colour them purple. Note that offering a foot-massage, is often a good "move" to test the waters (or even just be nice to a friend who's had a hard day).

But I fully applaud this kind of clear instruction - I like it.