E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
As a pig loves marjoram. Not at all. Lucretius tells us (vi. 974), Amaricinum fugitat sus, swine shun marjoram. The proverb is applied in somewhat this way: How did you like so-and-so? Ans.: Well, as a pig loves marjoram.