just remember to not get carried away bros. itll ruin your life if you let it. not that its ruined mine, im just buzzed and the topic came to mind. the numbing feeling is honestly not even enjoyable. dont know why some people like it. i prefer to have my senses sharp.
If you live in one of the more heavily occupied Israeli vassal states (e.g. anywhere in Europe) then this method may be your only way to obtain your freedom (from the jew of course, no gay rights here)
if you'd want this to work against rifle rounds you'd probably have to double them up. thinking about 3d printing a thin plate with some crushable infill to absorb kinetic energy and reduce bruising as well.