Galatians 5:18-19

Galatians 5:18-19. But if ye be led of the Spirit, ye are not under the law. Now the works of the flesh are manifest, which are these; adultery, fornication, uncleanness, lasciviousness,

Any kind of sensual indulgence - whatever it may be - a lustful glance, the cherishing of an unclean desire,- the utterance of a foul expression, all this is condemned, as well as the overt acts of adultery and fornication.