Well, a typical "he" will be male. In human, this means that "he" will produce hormone testosterone and not estrogen which is what "she" will produce. Also, "he" will not have a mammary glands...
Definition :A senior citizen who is 100 years old or older.In Literature :Short Trips: The Centenarian is a Big Finish original anthology edited by Ian Farrington and based on the long-running...