"Pork" and "pigmeat" are common sexual metaphors (meataphors!)in blues music. Blind Boy Fuller in "Black & Tan" sings: "I got me a pigmeat woman, I cannot use sowbelly no more." So Murray, there is an allusion rather than a full double entendre explicit in the line you mention. "Barbeque" is another word and all these words can refer to a woman and/or to the sexual act. "Pussy" is a more modern and generally understood term that has the same useage. For what it's worth, I think Blake sings "...used to eating porkchops, meat and salt"