[alwa]

I hadn’t thought about that, but that explanation suits me as to why “octopuses” comes off… I don’t know, muddy?… while the 1983 James Bond film named for the vulgar pun rolls off the tongue, even though they use virtually the same phonemes: it’s that the latter emphasizes the third syllable, making it metrical again.

Thank you for a nifty insight, whose effects I’d noticed but whose mechanism had never occurred to me before today!