You should let your dog lean on you.
I depends on the breed of your dog
No, if it is cold (or any temperature) the dog should not sleep wet. I will get sick... ARE YOU TRYING TO KILL YOUR DOG??!!
A sense of security and joy. Same reason he may sleep next to or on you.
8 hours
If the older dog allows it - yes.
Your dog should get regular amounts of sleep. 3-6 hours is recommended. If unsure, call your local veterinarian for advice. A comfy bed will give your dog advanced sleep. Do fluff the bed regularly.
you should adopt a dog because when you do you can sometimes save its life before it gets put to sleep
You should buy a toy that your dog really likes.
This has nothing to do whatsoever with the Jonas Brothers. Female dogs prefer male humans, it all depends on how old your dog is. If your dog has been doing that for quite some time, it just prefers to sleep with your brother (it probably likes to do something especially with you that it doesn't like to do with your brother).
Whenever HE/SHE is suffering.
No. Because that is bonding and the dog will continue sleeping with you instead of it's own bed
No, but he's probably upseat from the anesthesia. He needs to sleep. He should be fine the next day and you can feed him if he's hungry.