Romans 6:21
What benefit did you receive at that time from doing the things you are now ashamed of? For the end of such behavior is [spiritual] death.
2 Corinthians 4:2
Instead, we have renounced [the practice of] secret, disgraceful behavior. We do not practice deception, nor resort to distorting God's message. But, by making known the truth [i.e., the true message], we commend ourselves to everyone's conscience in the presence of God.
Ephesians 5:12
For it is shameful even to talk about the things they do in private.
Revelation 16:15
[Note: At this point the Lord's voice breaks into John's vision]. ("Look, I am coming like a thief. That person is happy who stays alert and is dressed [properly], so he does not appear naked and have to be shamefully exposed").