I am terrible at getting to sleep. Many nights I am still awake at 4am.
The conditions need to be perfect for me to drift off. Temperature, position, light, noise, pillow height and so on. I get so angry that this is the case, but any deviation results in just tenseness and lack of sleep.
DH on the other hand can fall, and has fallen, asleep anywhere. 
DH frequently has to sleep in hotels for his work - upto 4 times a week, When he's not away, he still works long hours so all the childcare falls to me, as you can imagine 3 hours sleep makes my quite tetchy.
Anyway the issue is that DH feels that I am snubbing him if he's not "allowed" to fall asleep cuddling me. I am happy to have a small cuddle, but absolutely cannot fall asleep while we are touching - he jerks, and twitches and strokes etc, his temperature is way higher than mine, causing me to overheat unpleasantly. No matter how many times I explain to him about it's not a reflection on my feelings towards him, it's just a necessity to enable me to drift off.
So, now when, he's actually in bed, I have to endure a cuddle for long enough for him to fall asleep deeply enough so I can nudge him gently to his side of the bed, so I can only then begin the long process of me drifting off. Sometimes by then, he's in snoring mode and I have to work to counteract that, too, thus lengthening the process.
So, AIBU to think my need for sleep trumps his need for affection?