It may be to do with your appetite. Might not, but what the fuck.
I sleep better when I eat heartily.
Granted, I don't feel like eating much, what with all the wine and beer and ganja but when I do eat, I feel immediately tired.
In fact, everytime I eat anything, I feel knackered immediately afterwards and would love to lay down. This doesn't work too much when I'm at work or in the house and it passes quite quickly when my missus shouts in my ear, which is often. So, tell my bitch to stop shouting in my ear and maybe I might get some sleep. Yappy bitch!!
Not you, her.