Version 1:
Well the ark had landed, the water had receded and it was time for the animals to go forth and multiply. After the animals left, Noah and his family went back into the ark to clean it up.
As Noah enter the ark he was met by all of the snakes. They had not left the confines of the ark at all.
Seeing this, Noah ask them, "Why have you not left to go forth and multiple as God has commanded?".
In reply one of the larger snakes slithered closer to Noah and exclaimed, "but how can we....we are adders?"
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Version 2:
Noah was told that of all the animals on the ark, only the adders refused to obey God's command and go forth and multiply.
"Well," said Noah. "I'll have to ask the Lord what to do about that." And so he prayed to God and said, "These snakes won't go forth and multiply"
And God said, "Don't worry. Find some trees and saw them into logs and create a platform sitting upon four legs. Then put the snakes on the platform."
"But how will that help the snakes?" asked Noah.
"Easy," replied God, "Everyone knows even adders can multiply using a log table!"

Do I apologize now or what 'til later???