Your ass is grass.
More Traditional Proverbs:
A fine beer may be judged with only one sip, but it's better to be thoroughly sure.Traditional
True words are not fine, Fine words are not true.
Traditional
Water floats a ship. Water sinks a ship.
Traditional
He that would learn to pray, let him go to sea.
Traditional
Fear of death is worse than death itself.
Traditional
If you wish to do a good deed, consult no one.
Traditional