"I love my master, etc.": This tells me only of one who has a wife and children and his master has children (that his ear is bored). Whence do we derive that if his master does not have a wife and children (that his ear is not bored)? From (Devarim 15:16) "and it shall be, if he say to you, etc." From here it is derived that he is not bored unless both he and his master have wife and children.