Defendant requests your Honor to charge the jury that if the commonwealth have established merely a slight, trifling, and inconsequential motive for the commission of the act charged in the indictment, they should regard it as important and give it more consideration in connection with the question of the defendant's mental condition. XXXII Defendant requests your Honor to charge the jury that the commission of the crime charged in the indictment by a child of tender years from its very nature raises the question of abnormality of the defendant's mind and in the absence of clear, strong, and convincing evidence on the part of the commonwealth, it must conclude that the defendant's mental condition was such that he did not understand the wrongfulness of his act or understand the nature and quality of his act. XXXIII Defendant requests your Honor to charge that evidence of the want of a rational and reasonable motive on the part of the defendant for the perpetration of the act charged in the indictment is to be considered by the jury as strong corroboration of the fact of his mental irresponsibility. XXXIV Defendant requests your Honor to charge that the perpetration of the act charged in the indictment without any apparent motive or object, but against every motive which would appear to be naturally influential with the defendant, that they must at once inquire whether or not the defendant was of sound mind and take into consideration with the other evidence of this case that he was not of sound mind, the absence of sufficient motive must lead them to conclude that he was of unsound mind and could not distinguish between right and wrong or know the nature and quality of his act. XXXV Defendant requests your Honor to charge that the absence of a clear and convincing motive in itself is evidence of an unsound mind. XXXVI Defendant requests your Honor to charge that if the defendant acted without any reasonable or rational motive or object, but against every motive and object, which it would appear should have been influential with him, that fact in itself raises a presumption that the defendant was of such unsound mind that he could not distinguish between right and wrong or know the nature or quality of his act. XXXVII Defendant requests your Honor to charge the jury that they have no right to presume a motive from the mere commission of the crime and have no right to speculate, guess, or surmise or supply any motive for the commission of the act charged in the indictment. XXXVIII Defendant requests your Honor to charge that the failure of the commonwealth to call as witnesses Drs. Maybon and Palmer, who made examinations of the defendant, to testify as to his mental condition, raises the inference that if they had been called as witnesses, they would have testified adversely to the commonwealth in respect to the defendant's mental condition. XXXIX