Found the rest of the post, no idea how to link the answer directly:

How many of you can do the above without any hesitation? Finding it very difficult, right? Well, nothing wrong in not being able to hurt oneself.

However,

I knew a person who could not poke himself with a needle yet he jumped from the top floor of a building.

Yes, depression is real.

So... The fuck was he on about?

???

Am I weird for not reading the question and thinking this was about a cool single drop of blood needle gizmo