To be ashamed (Genesis 2:25) signifies to be in evil

(Reference: Arcana Coelestia 163)

163. Verse 25 And they were both naked, the man and his wife, and they were not ashamed. 'They were naked and they were not ashamed' means that they were innocent. To be exact, the Lord had instilled innocence into their proprium to keep it from being unacceptable.