Your Dog is Being Protective
Another reason why your dog might be doing this action a lot is that they become especially protective when you are around other people or animals.
Your Dog Loves Your Scent
Your distinctive smell is the scent of belonging. You may also catch your dog rolling on your bed, clothes, or sheets from time to time.
Your Dog Feels Safer
Sleeping or laying on top of you could be helping your fur-baby feel safer and less vulnerable.
Your Dog Wants Your Attention
Your dog is trying to get extra attention from you. This behavior would be more likely if you have not given your dog attention for a while.
Your Dog Is Happy
Yes, laying on top of you makes your dog happy. You have the love hormone Oxytocin to thank for that.