I think there's really no way that you can get people to respect that, but I would just ignore them and let them keep living there life in sin the way I believe.
I have heard that when Miley Cyrus was just fifteen she and Jessie McCartney became boyfriend and girlfriend. (Jessie was twenty-one.) Miley's dad, Billy Ray Cyrus was worried about her having sex...
If the man & woman can't agree on how often & what kind of sex to have it might cause a marriage to fail eventually. Better find out if you're sexually compatible before marriage than...
According to christian belief it is absolutely wrong to have sex before marrige, it is considered imoral and wrong. And in the old testament the Jewish law was to stone a lady or a man to death.