I thought I'd test this here before picking a fight with DH about it 
Both DH and I are tired. The DCs are poor sleepers (each is up at least once a night), and we both work the same amount. We get up at different times with them, but probably end up, on average, being up the same amount with them. We have a deal whereby we get a lie-in each a weekend: he tends to doze during his, whereas I sleep like a log.
BUT whereas I try to go to bed early most nights, he stays up late playing computer games so is often in bed at least an hour later than me, maybe more. And, our lie in arrangement is premised on the idea that we are both the same amount of tired.
AIBU to think that if he chooses to stay up late and that's contributing to his tiredness he doesn't deserve a lie in and should give his to me? I'm getting a bit grumpy about it, but am not sure if it's just the tiredness talking. 
Or is the sleep deprivation addling my brain and not only am IBU but need more
?