A male significant other that is bigger, and more physically capable to protect his companion, yet is loyal, accommodating, and submissive to his significant other.
"Your boyfriend is so strong, he must wear the pants in the relationship."
"He is strong, but he's more of a Doberman Boyfriend."
Breed of dog, named for the creator of the breed, Louis Dobermann. Mr. Dobermann was a tax collector in Germany and wanted a good protection dog. Dobermans are truly a man-made breed. Some of the breeds thought to have contributed to the Doberman are German Pinschers, Manchester terriers, Weimeraners, and Rottweiler.