Fuk, I want one.
But it would make a terrible buttplug, so I would just have it as a desk decoration.
I started searching for it hoping it wasn't just a joke because I also think it looks gorgeous! Time to go find some brutalist desk sculptures now...
Brutalist architecture can be curved. I'd aregu the edges and corners are unnecessarily harsh for a buttplug. The hardness and porousness of the stone is brutal enough.