I ravish His heart, a couple things 1. simply put first lets define marriage: the act of 2 people covenanting together in the bonds of Holy Matrimony witnessed by someone right? Right. so Eve was joined to Adam in the presence of God so there was both an official pronunciation of the marriage and a covenant (which is always ratified through blood, hence the consummation of the marriage) So God both witnessed and officiated this marriage and "that which God has joined let no man separate". 2nd in a slightly longer allegorical answer is that God often uses a physical or natural description to refer to the spiritual realm for example, Is 14 talks about the King of Babylon who was a real person and it is about him, it is just also a direct reference to lucifer becoming satan. with this in mind we see there is the tabernacle the temple of God, there were three places outer courts, inner courts/ holy place, and the Most Holy place or the Holy of Holies. So it is with us we have a body, that possess a soul that has a spirit each 3 being progressively more intimate than the first, same with our relationships outer courts equal those we see and kind of know at school or work- associates, then there are the inner courts- family, good friends, and then there is the holy of holies the inmost parts shared only between a husband and his wife. also everytime one fornicates (all the kissing and touching stuff before marriage that is not the act of penetration) or engages in premarital sex they effectively bind themselves to that person without the marriage ceremony or commitment, this is why some psychologists say things like you give apart of yourself to someone you are or have had sex with, because you literally have you bonded your spirit with the others. I hope this is helpful.