What happens when you date a toxic person?

You want to know about their lives, their hopes and fears. With a toxic person, it usually goes to the extreme. If you find that the conversation is always about you and you feel that you are but a prop in their show, its a tell-tale sign that the person you are dating is toxic — or has toxic tendencies.

What is the most toxic thing ever?

Botulinum toxin Scientists differ about the relative toxicities of substances, but they seem to agree that botulinum toxin, produced by anaerobic bacteria, is the most toxic substance known. Its LD50 is tiny – at most 1 nanogram per kilogram can kill a human.