Here are the lyrics:
>Snail, snail, come out of your shell,
>I'll give you a diamond, and a ring as well.
>I'll give you a puppy dog, and a puppy tail,
>And a pretty little girl to take you for a sail.
While it doesn't mention snakes, it does feature snails, puppy tails, and a "pretty little girl" which aligns with the elements you described.