Oh yeah I am the same with sleeping with my head under the blankets. I often make a litle hole so I can breath. I hate sleeping in a sleeping bag when you can pull it far enough up.
I have done this all my life and it used to freak my parents out, they would come in and uncover me and it would really annoy me.
When I first met DH he used to not be abale to stand any of his food touching, all vegies and meats had to be cooked seperately served seperately, eaten seperately and eaten in a particular order Made for an interesting dinner time when I used to cook up stir-frys. I'm so glad hes gotten over it as I love to cook up stirfrys and is no way i could ever be bothered seperating. I do still catch him sometimes eating stirfrys by catergory (meat, beans, pineapple, carrots then noodles etc.)