Its both spiritual and physical but in old testament time it was spiritual the children of Israel worship false gods and the living true God is a jealous God. Today man throw all types of spiritual nonsense at Christian sin is sin only one is not for given blasphemy against the Holy Ghost. And if you practice sin its what separate one from God and gambles at ever lasting life.
adultery is when a man or woman that are married have sexual intercourse w/ someone that isn't their husband or wife...so i agree w/ mira 23. its also the only way that someone can get divorced, but know a days poeple get devorced for any insignificant reason instead of working it out. that's why you should get to know the person in depth first and be 100% sure that you want to spend the rest of your life w/ him or her.
i hate cheaters...it is wrong to do that to me...my ex-husband did that, i caught him on valentines day 19 tears ago, i never cheated, and i hate cheaters...why get married if you are going to cheat, just stay single...is my belief..