Still, he was curious as to the reasoning behind the Kandilkari's behavior.

Add his tendency to take what people say at face value, and he completely misses the reasons or intentions behind their behavior.

But experts did not know the reason behind our seemingly irrational behavior.

Podkayne suspects the reason behind her brother's behavior, but cannot prove it.

You will also come to see the reason behind their very odd behavior!

More importantly, the motives behind his behavior would always be questioned.

But even in the beginning scenes, before we understand all the reasons behind your characters' behavior, they shouldn't be ciphers.

If there was anything sinister behind Marco's strange behavior, perhaps it might show up in his records.

The unconscious forces behind his behavior were being made conscious.