I won’t say it’s a widespread trope, but it’s definitely a recurring trope I’ve bumped into from…

dizzyhslightlyvoided : not-this-crude-matter : prokopetz : I won't say it's a widespread trope, but it's definitely a recurring trope I've bumped into from several different furry porn artists where a character is bioluminescent, but it's specifically their glans, and now I'm trying to imagine what evolutionary scenario a brightly glowing cockhead could possibly be adaptive for. It's only glowing…