Social hierarchies serve to constrict freedom of choice.

What's the name of that snake that kills its prey by constricting it?

That is not my fault; the grown-ups had put a stop to my artistic career when I was six and I had never drawn anything other than my two boa constrictors.

She was a tiny girl, but she really held her own on the baritone sax. Nonetheless, I couldn't help but imagine the thing wrapping itself around her and devouring her like a boa constrictor.