God Does Not Approve of ANY Sexual Sin. (Note the link to idolatry.)

 7) “Why should I forgive you?

     Your children have forsaken me

    and sworn by gods that are not gods.

     I supplied all their needs,
    yet they committed adultery
    and thronged to the houses of prostitutes.
8) They are well-fed, lusty stallions,
    each neighing for another man’s wife. 

Jeremiah 5:7.