One of my friends in North Carolina was 4 foot 10, and about 120 pounds. Her great dane, Spook, was taller when he was sitting the she was standing up. It was always funny when he got in trouble and Tracy was correcting him. There he was looking down at her with a look of " I'm sorry mom!" on his face.
One of my ex-girlfriends (also my vet and a close friend) has an Irish Wolfhound named Sam. Shannon is 4 foot 11 and 119 pounds. Sam is tall enough to look her in the eye, and he goes about 170 pounds. When she takes him to work with her, she has to fold up the back seat in her f-250 so jhe can ride with some degree of comfort.
near as I can tell, those dogs were definitely not photoshopped.
If I have to explain why I ride, you wouldn't understand. Explaining sex to an alien would be easier than explaining the feeling, one that boils all that is going on in your life down to what really matters each time you are in The Wind. All I can say is, Life is not Life without it.