Actually, thats not a blade
Its called: the fu*k chair, where a girl sits on it and she gets fu*ked. This is usually used by single women that dont want their man charged for statutory [i would have my commenting disabled for saying it]. The man fills the chair's injection system with his own cum. It can also be used as a torture method, where a woman is strapped to the chair and theres enough cum to last the same amount of time the torture is used, i.e.:12 hours of cum for a 12 hour torture method.