Or foreplay-less sex is,

from Lupe Fiasco (Ft. Gemini) – Dumb it Down Lyrics on Rap Genius

Meaning

“Foreplay-less sex” = no oral sex, aka “giving head”/“giving brain”

Thus, foreplay-less sex is “headless” like the horseman.. foreplay-less sex is also terrible!!!! (but Lupe’s trying to say he “cuts to the chase”, doesn’t “beat around the bush”, etc.)

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