who sweetened the snatches of a million girls trembling in the sunset, and were red eyed in the morning but were prepared to sweeten the snatch of the sunrise
I notice that this poem seems to shift on what sort of "sin" it focuses on. The beginning of the poem is very much about drugs, and the resulting bender from taking them. Meanwhile, this section and the stanzas behind it are highly sexual in nature, seeming to portray such pursuits in a sublime, even divine light. Perhaps promising to themselves to do it all again the next day.
However...they don't. The poem moves on to its next fixation instead.