He’s a little wet behind the ears.
More Traditional Proverbs:
At a distance from home a man is judged by what he means.Traditional
The first time it is a favor the second, a rule.
Traditional
All criminals turn preachers under the gallows.
Traditional
Many a man's nose was broken by his mouth.
Traditional
A healthy family is sacred territory.
Traditional
If you love something set it free if it returns its yours forever, if not it was nevermeant to be.
Traditional