While the original poem is already full of sexual imagery, an alternative version makes this more explicit. It has a different chorus, referring to a phallic “staun o’ staunin’ graith” (roughly “an erection of astonishing size”), “kiss” is replaced by “fuck”, and Jenny’s “thing” in stanza four is identified as her “cunt”.

All of our big brains and art and math really are just increasingly complex ways of getting our freak on.