You are quite creative ! I've had nettles and whips used on my cock a lot before but this set up is great ... I' like to incorporate some of your suggestions too.
What a great video and great idea. Will definitely be trying this. I think you should have made the tied end harder to untie in case you dropped the key. And would it have benefitted from more nettles on the rope? And maybe some on the ground where you were walking? And as I think about it may be a rubber or electric rope pulling you back? And what about another string at shoulder height with nettles hanging down at nipple level? What a catalyst! Keep it up
Bring some roots indoors in pots to grow on.... The annual nettle is the worst, even I have to wear gloves handling them at work. you needed someone with a riding crop following, making sure you moved faster!