Just a reminder that Owen Wister was the author of the first "realistic" full-fledged "cowboy novel," "The Virginian" (1903). "Realism," of course, is relative: that's why it's in quotes. The romantic plot and leisurely pace make the book really tough going today.

But it also contributed the immortal line, "When yuh call me that,
smile!"

Concerning the baby song, I too find it repulsive. But it's only a sick fantasy intended, in its final incarnation, to gross out or top out. Theer are others. Vance Randolph discovered a few in the Ozarks between 1920 and 1954, and more modern examples appear in military and rugby songbooks.

G. Legman's limerick collections contain a significant number of limericks like this. As we all should know by now, "traditional" isn't fully synonymous with "nice" any more than "nice" is synonymous with "human."