Within the EU, there is considerable diversity on morally sensitive issues, such as the legal recognition of same-sex relationships or reproductive matters (abortion, assisted reproduction, surrogacy, etc.). States generally express recognition of such diversity and it is explicitly respected at the European level, even though the (implicit) influence of European law is increasingly visible in these areas. Cross-border movement within the EU adds a new dimension to this complex picture. Member States are increasingly confronted by one another's regimes. For example, same-sex couples who...