From Amazon Q&A
Q: Can i use this on my balls?
A: Yes... Yes you can. But take my advice: Do this at least 1 and preferably 2 days before any planned "activities". Expect it to burn if your sack comes into contact with anything more than warm water. And if you think something like Aloe is going to soothe the burn, then prepare to experience what it's like for Satan himself to fry your nuts on a hot cast iron skillet. Seriously.
Q: Will this work for white men as well??
My (white) husband had a very bad reaction on his face from trying it. But I use it on my lady bits and have always had great results! Do a test patch, before you go all in!