Against a No Trump contract, If somebody leads
a TWO you immediately know he has PRECISELY a FOUR CARD SUIT, as
there is nothing lower than a two and you can now work out whole layout
of one suit just from the lead as you can see your own hand and dummy so
can work out how many cards are in the other defender's hand.
K32 opposite 654 arrange to be last person to play to protect your
King. you want to be last person to play and not second and
lay yourelf to be finessed by the nasty defender.
When declarer is playing his strong suit there
is no point in encouraging or discouraging so GIVE THE COUNT instead