Is it easier for us to accept the pushes for changes in mores because the consequences are physically remote from us or hidden due to our ignorance? Or because they are taken care of by someone else (e.g. the government)? Who cares if she's a single mom? It's not our problem -- she can get aid from the government and the schools will give child care. We can see how the no harm principle of liberalism would harmonize with this -- if the harm is not obvious and all consent, then why shouldn't it be allowed? Who cares about what they do in the privacy of the bedroom? But we don't know what the impact of their actions on their own psychology or their relationship with others is like. Those who push for the normalization of homosexual relationships are bound to say that there is nothing subjectively wrong.