Taken from his home in Africa by the mysterious, unnamed “Man in the Yellow Hat” at a very young age, this popular children’s book star has captivated audiences with his books, television series and movies.
But, as most of us know, monkeys have tails, and Curious George does not.
We see George with his mother, brothers and sisters, but in his very next book George is taken from Africa by the Man with the Yellow Hat with no depicted psychological turmoil, per se. George’s abduction is played more as an adoption, and George is more than willing to be with his new friend.
One comment from Yahoo Answers suggested that George used to have a tail until he became curious about a lawnmower. Though this answer has great explanatory power, in the book series continuity (none of his brothers or sisters have tails either) the tailless-ness is clearly genetic rather than environmental.
…in the Organization of abundance of its Parts, it more approached to the Structure of the same in Men: But where it differs from a Man, there it resembles plainly the Common Ape, more than any other Animal.
Since George never expresses the aggressive behavior of chimpanzees, the Man in the Yellow Hat seems in little danger of having his face chewed off.