0 said to emphasize that people should not be surprised when boys or men act in a rough or noisy way because this is part of the male character
I suppose that boys will be boys—they will wear the latest fashionable clothes, drive the latest fashionable cars and acquire the latest fashionable goods.
It was wrong of them, no doubt, but boys will be boys.
Boys will be boys, and we have all been young.
Boys will be boys, and the idea is that they actually fire at each other and the hits that they record are electronically registered.
Because boys will be boys, it is natural for a boy to jump over a fence rather than walk round and go through the legitimate way.
Others write off dangerous acts as boys will be boys.
The auxiliary will can also be used to indicate gnomic aspect (boys will be boys).