For the purposes of this Division,
"sexual intercourse" means--
(a) sexual connection occasioned by the penetration to any extent of the genitalia (including a surgically constructed vagina) of a female person or the anus of any person by--(i) any part of the body of another person, or(ii) any object manipulated by another person,except where the penetration is carried out for proper medical purposes, or
(b) sexual connection occasioned by the introduction of any part of the penis of a person into the mouth of another person, or
(c) cunnilingus, or
(d) the continuation of sexual intercourse as defined in paragraph (a), (b) or (c).