They do not show a lot of affection openly, but they are very loyal and devoted to the entire family. Unlike some breeds that are "one man dog" that are loyal to one or two members of the family; the Mastiff seems to know who the family members are and are loyal to the whole family. They are protective of the family, especially with strangers. If a stranger comes to their home, often the Mastiff will place itself between his family and the stranger. They stay that way until their master gives some indication is the visitor is a friend or not. With their massive size, (many are over 200 pounds), there aren't very many people that would want to cross the boundary line without them allowing it.
There have been more then just Zorba that have made world records for being the largest or biggest dogs in the world. Zorba, however, still holds the record in the world for being the largest and longest dog ever to be recorded. He is presently not in the Guinness Book of World Records because he is deceased, but no one to this date has topped his size.
Zorba was over 343 pounds, measured 8 feet 3 inches long to his nose to his tail and stood 37 inches at the shoulder. He was recorded in the books as Aicama Zorba in November 1989 at the age of 8 years old. Chris Eraclides of London, England owned him. Even though, Zorba has passed away and he is no longer listed in the Guinness Book, he is still remembered fondly in the canine world. Deceased or not, there are many that still consider Zorba the greatest and largest dog ever, regardless of who is listed in the book.