Oh I'm interested!
I actually found this dare today after coming back to getDare after a long break. I even joined the forum for this
I even got the worms just a minute ago so I'm gonna try this real soon!
UPDATE:
Well that was an interesting experience. The worms I had were just normal earthworms, I don't know about their exact species.
I quickly rinsed them with warm water to get the dirt off and warm them up. Then I put them all over my crotch in my underwear. The feeling was extremely interesting and nice, they were softly moving and wiggling around but it could have been better. The worms were a bit passive in the dark of my boxers and they tended to gravitate lower, away from pubic area and my dick so overall the experience was not as mind blowing as I had hoped.
The box contained about 50 of them and I used them all.