Brain

Virtually every slut has a face, and virtually ever slut with a face has a brain, so almost all of us have this perk!
Slut brains are exceptionally plush, pink, warm, gooey, and fuckable~! Skullfucking is the act of penetrating lashes to fuck the brain, and this is the most straightforward form of brain sex. Earfucking works too! Even mortals can regenerate through gentle brainfucking. Higher tiers can even survive brains exploding!
Did You know that even with "normal" humans, the brain is the softest tissue in one's entire body~?