樓主廣征博引，窮源溯流，體大思精，當知英國半個世紀前就曾“為天下先”，立法規定“同性戀年齡”吧？

Sexual Offences Act 1967

1.- (1), Notwithstanding any statutory or common law provision, but subject to the provisions of the next following section, a homosexual act in private shall not be an offence provided that the parties consent thereto and have attained the age of twenty-one years. (Amendment to law relating to homosexual acts in private)

 

盡管這既沒被人當作“世界的福音“，也沒成為”在社會建設方麵為天下式的開端“