Sorry what do you mean? What do the tolls refer to?
Mini spoilers: It's essentially a 'makeshift d*ldo' (the novel calls it a false phallus). Ain had to keep it inserted inside him throughout the day so he would be ready whenever his master(s) wanted him. Having it inside him for so long made him nauseous and unable to eat.
This is so tragic and horrible, oh my God... Thank you for telling me
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man,,ian talking abt "tools" in passing, novel readers ykw I'm talking abt
OKAY BUT IAN'S TITS GENUINELY MAKE ME DIZZY HE'S SO HOT I CANNOT