boys will be boys

:  a male child from birth to adulthood

:  son

:  an immature male

:  desire, wish

: used to express desire, choice, willingness, consent, or in negative constructions refusal

: used to express frequent, customary, or habitual action or natural tendency or disposition

:  desire, wish: such as

:  disposition, inclination

:  appetite, passion

:  to order or direct by a will

:  to dispose of by or as if by a will :  bequeath

:  to determine by an act of choice