1. The common-law definition of rape is not unconstitutional per se but needs to be developed to include non-consensual anal penetration of females to align with the spirit, purport and objects of the Bill of Rights, particularly the rights to dignity, equality, freedom and security of the person, and children's rights. 2. When developing the common law of crimes, courts may order prospective application only to avoid violating the constitutional principle of legality under section 35(3)(l), which provides that no person may be convicted of conduct that was not an offence at the time it was committed. 3. Magistrates' Courts do not have the constitutional or statutory power to develop the common law, as they are excluded from section 173 of the Constitution and constrained by section 110 of the Magistrates' Court Act. 4. Common-law development must be incremental and fact-driven; courts should confine themselves to developments necessitated by the facts before them and avoid appropriating the Legislature's primary role in law reform. 5. The extended definition of rape should be: the intentional, unlawful penetration of the female vagina or anus by a male penis without consent.