tallyho!
Following a strict mediterranean diet...
No my flexion is not turning the head. Infact the 'head' hardly seems to move. What you are wanting is a 'relaxation' to the flex, and the flex can be in different parts of the neck/body. Eg, poll or base of neck or rib cage. What you are aiming to do is release tension through the whole spine so the contact can be taken forwards and out.
Ok, I think I understand. Easy, I think that for advanced riders and people who understand in-hand and what you are trying to achieve. It needs to be used in context though for people who don't so that it's not seen as just controlling the head and neck gets results because they may not realise how - which is why there is such a big share in gadgets.