As used in this subtitle:
(1) “Adult” means any person eighteen (18) years of age or older;
(2) “Deviate sexual activity” means any act of sexual gratification involving: The penetration, however slight, of the anus or mouth of a person by the penis of another person; or
(3) The penetration, however slight, of the labia majora or anus of a person by any body member of or foreign instrument manipulated by another person;
(4) “Incompetent” means any person unable to care for himself or herself because of physical or mental disease or defect.
(5) The status embraced by “incompetent” may or may not exist regardless of any adjudication concerning incompetency;
(6) “Minor” means any person under eighteen (18) years of age; and
(7) “Sexual intercourse” means penetration, however slight, of the labia majora by a penis.