C'mon, don't say that. You must sleep at night. Everyone must sleep at night. If a person does not sleep at night, he is so tired next day that he cannot do anything.
I don't care said Nigel. Anyway, I will stay awake all night, said Nigel decisively.

In fact, Nigel did fall asleep in no time but if it only would have been possible, there is no doubt about it that he would have stayed up all night in order to escape his nightmares.