'Impurity' in the Bible

Therefore God delivered them over in the cravings of their hearts to sexual impurity, so that their bodies were degraded among themselves.

I am using a human analogy because of the weakness of your flesh. For just as you offered the parts of yourselves as slaves to moral impurity, and to greater and greater lawlessness, so now offer them as slaves to righteousness, which results in sanctification.

Let us walk with decency, as in the daylight: not in carousing and drunkenness; not in sexual impurity and promiscuity; not in quarreling and jealousy.