Singer is invited home by his "pretty young lass." She pushes him in the hog-tub and, had not a friend come by to save him, he would have drowned. He takes his love to a dance. He defends kissing: if bad it would not have approval of parsons and ladies.
Opie-Oxford2 298, "It's once I courted as pretty a lass" has only the first verse. The description is from broadside Bodleian Firth b.33(36). - BS
There is a very complicated situation here, with "The Hog-Tub" sharing lyrics with "Kissing's No Sin (I)," which shares them with "The Mautman." I have no idea how these strands are to be disentangled. For more, see the notes to "Kissing's No Sin (I)." - RBW