I am not sure what you mean by a social ethical sanction. If you are asking me if I can do anything I feel like doing then no I don’t believe that. I believe there is an objective standard of morality. Man’s life is the standard or to put it another way man’s individual rights are the standard. Man’s rights are a consequence of his nature which is an objective absolute. Anything that violates individual rights is immoral.
(As if there are "objective" agreements on men's "individual rights" even from one country to another...even in China, some provinces are a little more lax on the "one child allowed per family" -- and others are quite strict in enforcing that...cultures greatly differ on individual female rights...so here you cite often arbitrary distinctions & arbitrary cultural "standards" as some sort of "standard"...sorry, that's all quite subjective, NOT objective)