So when certain countries convict rape victims on adultery charges (or something similar), that's "right" because the consensus in that country agrees? Does that mean slvery was right until we reached a consensus that it was wrong? (Have we even reached that consensus worldwide?)
Did the killing of Jews by the Nazis havve consensus in Germany? How about feeding Christians to lions in Rome? (You are probably OK with that one.)
The sands of consensus shift too frequently to serve as an adequate foundation for right and wrong.
P.S. - About your screen name: It's not YOUR body that's the issue.