As Attitude and Power equals airspeed or altitude/height.....and the Auto-Pilot is maintaining height (thinking of the bottom of the approach)....what is counter-intuitive about having to lower collective (reduce power) to slow down?
If you do not adjust power as the aircraft levels due to the auto-pilot attempting to maintain a height....the aircraft will pitch upwards and slow down.....fail to add some power and you might well get too slow, lose auto-pilot authority and see a downward trend on height.
If the basic laws of flight escape you....perhaps you might just be in the wrong profession.
A few minutes of practice now and then is a simple way to stay in touch with those basic relationships.
Sasless - while you are busy teaching us to suck eggs, just remember that A. you are not the only helicopter pilot in the world who can fly an ILS (or even go backwards up it - and old trick from Shawbury to confuse trainee ATCers) and B. that lowering the lever on a coupled ILS in a 3 axis AP will cause the IAS to reduce - I am not talking about the auto level portion well after DA/DH - which is how the Sumburgh aircraft ended up in VRS and the sea - using power to control IAS in this way is counter intuitive. Whilst I agree that practice helps, so does a 4-axis AP that flys height/RoD using collective and IAS using cyclic which is how most of us are taught to fly a manual ILS