Generally that is very common when treating the neck. It is just the reality of the optimumheight for the therapist to cradle your neck and be able to manually move it about without wearing out their arms. Often i have even rested someones head on my thighs in a retracted/extended position to help support and end of range hold. Now I have never thought of that as suggestive, but then I would pick my patients on who NOT to do this to. Maybe your thoughts are drifting? Then of course friendly banter is always at play in the physio room. It's unfortunate that if you were a woman and the therapist a man, they would probably be up on allegations and a disciplinary panel.