Heterosexual activity must always be with self-control. Copulation must always be limited to activity with one's spouse. Heterosexual thoughts must be constrained. Non rejected adulterous thoughts are mortally sinful. Homosexual orientation as with heterosexual orientation is of itself not a sin unless it is self-willed.
Homosexual activity is always gravely sinful and falls under the general term sodomy.
Homosexual thoughts must be avoided or restricted as much as possible or sin is committed. Apart from within a moral marriage all forms of sensually stimulating conduct is conducive to promoting sexual activity and should be avoided by those who say they believe in God and are desirous of entering Heaven. Many believe that the world is or is becoming overpopulated. Many citizens and governments favor population control. Promotion of population control is against God's expressed command to be fertile and multiply.