A poem from Whitman (song of myself, 2) uses the word perfume and also perfumes.
Both in different videos on the web or google translate pronounce perfume and perfumes in different way. Frequently the accent is in fu when pronouncing perfume, an in per when pronouncing perfumes. This seems to me the correct way, but I've found some videos with different pronunciation.
Is it correct? Is there a simple rule for pronunciation in those cases?