heh. for some reason a lot of my posts have been not showing up on various threads.
I tried to reply about the sting. Most of the sting comes from little hairs on the underside of the leaves so best to only touch the stems and far down from the leaves.
There is another plant called jewel weed or touchmenot that often grows nearby and you can crush the leaves of that plant and rub on a sting and it will stop it immediately.

https://imgur.com/a/ScWLTW1