I DON'T HAVE A LOT OF KNOWLEGE OF THESE BUT WILL SHARE A FEW PICTURES. WHY THEY PREFER THE RAISED DESIGNS OF SCARIFICATION INSTEAD OF TATOOS

I AM SURE THEY HAVE THEIR REASONS AND RITUALS AND NO DOUBT CONSIDER IT BEAUTIFUL.
1. PICTURES OF SEVERAL KNIVES FIRST ONE IS 17CM.LONG
2. PICTURE OF 3 PEOPLE KUBA TRIBE
3. PICTURE OF ONE WARRIORS BACK CONGO

TRIBE
4. PICTURE OF UNKNOWN TRIBAL SCARIFICATION AND A OCEANIC TATOO