I've got stiff, curly facial hair (just for informational purposes: i'm white male) and the damm Razor Bumps are absolute PAIN IN THE BUTTOCKS.
You can't even imagine how annoying it is.
I found solution though: 0,5mm trimmer.
Looks almost like clean shave, 0 bumps.
Also, stay away from black holes :)
Cheers!
I haven't researched it myself but I don't think that shaving a wild beard has a lot of influence over butt pain...
Don't you say -.-'
I was waiting when somebody is gonna point that out ;)
lol