you could try this?https://www.amazon.com/Mavala-Stop-Biting-Sucking-0-3-Fluid/dp/B0000YUXI0
I bite/pick my nails and the skin around them and other skin on my hands when I'm bored or stressed or both
bite your nuts instead
this might work
u gotta be real flexible
or just have a real stretchy sack
dude picking on your nails to shorten them is where it's at