Cliff Klingenhagen

Cliff Klingenhagen had me in to dine
With him one day; and after soup and meat, And all the other things there were to eat, Cliff took two glasses and filled one with wine And one with wormwood. Then, without a sign For me to choose at all, he took the draught Of bitterness himself, and lightly quaffed It off, and said the other one was mine.
Source

And when I asked him what the deuce he meant By doing that, he only looked at me
And smiled, and said it was a way of his.
And though I know the fellow, I have spent
Long time a-wondering when I shall be
As happy as Cliff Klingenhagen is.