All three of us picked up on the weirdness at about the same time.
Sounds like Pops was just plain nasty. What’s with Pops making Barry smell his shorts?
If “Pops” is Frank Marshall Davis, he did a lot more to Barry than make him smell his shorts.
Concerning the “amber stains” on both “Pop” and, presumably, young Obumble, the first-person narrarator of the poem:
When his horrible “poetry” was discussed in another article several months ago, someone pointed out that Frank Marshall Davis, the racist/pervert/Communist/Obama mentor, who wrote weird porn under an assumed name, was into “golden showers” and whatnot. Between that detail and some other facts gleaned from the poem, some consider it an ode to Davis.