Lately I've been thinking about that very question myself,
as it used to be my teddy bear or pacifier when I was younger,
however since coming to really re-appreciate my beloved girl in the two year absence caused by the pandemic all things considered,
that it's come to my attention that my dog Freeway is my literal security blanket as she seems to be all to ready to say it's okay I'll protect you and that is great for me as I need her as much as she needs me.
as her fur is so soothing and the fact is shes more than my dog to me shes my angel, and going back to what I am saying shes also my real life teddy-dog of sorts
as she loves to cuddle up with me every morning and kiss me,
or during the eavenings before my bed time or when-ever I she sences that I am depressed or stressed out
shes always there to calm me down and if necessay wipe away my tears on a bad day as there are some days when I just can't cope with the outside world anymore as I suffer from episodes of ptsd, see my previous replies for more information.
And if not for her I dread to think what would happen to me as I would be lost in a dark place so to speak at least in terms of my mind Psychologically speaking.
And whilst its true that I've had dogs in my past before see my previous replies,
and don't get me wrong I loved them too however my current girl freeway is the closest that I have come so far to heaven and shes also my literal guardian angel.
See my previous reply to whats your favourite breed/type of dog if you have not done so already.