> They are resourceful, sneaky and relentless.

... and honest:

- they will honestly tell you that they'd be very happy to see you dead when you impose restrictions upon them (people who are older will of course possibly get into legal trouble for such a statement)

- they will tell they they wish you'd never have given birth to them (or aborted them)

- they will tell you that since they never wanted to be born, they owe you nothing

- ...