Forgive my silly questions-ACP's eye & Daya's slap

If any die-hard fan of CID feels offended with this thread, I apologize in advance, as my younger brother is also a die-hard fan of this serial. Just asking for this fun.

First question, the moment Daya gives a slap, the main-criminal confesses everything (may be because police confessions are not admissible in the court so why suffer in Daya's hands!)
Is there any episode where the main-criminal doesn't confess despite getting slapped by Daya ?😛

Secondly, Why does the ACP show his big-eye balls all the time, does he never feel the eye-pain? or does he come on set with a bag full of eye-drops? When Daya's slap is sufficient to extract confession, why does ACP take this pain of trying to scare the criminal with his big eyes? or does he want to prevent Daya from taking all the audiences' credit for extracting the confession?

Thirdly, Why do they always cast no0b people without any acting skills for maa-baap,bahu & girlfriend roles? I'm yet to recall any episode where victims' or criminals' relatives gave a powerful performance or atleast a matching performance to the level of any CID crew.

Why do criminals always dump the dead bodies on the building's roof-tank?

Why every second crime takes place in a hotel?

% wise, how many crimes are related with love-triangle in CID? (I guess >70%)

So far in this serial, How many victims & dead bodies were female? (I guess >80%?)