In case you're wondering why someone would bother peeling off only the outer rind, here's an answer from Honduras:
Separating the rind from the pith allows you to suck the juice out of the orange without having to taste the rind.
These oranges are sold to "people on the go." Taxi drivers stick their arm out of their taxi and exchange money for an orange, people walking to and from work grab an orange for a quick refreshment. It's quick, easy, and delicious. After being peeled, they are split in half, and a bit of a salt and pepper mixture is added in between both halves. The orange is cut 95% through so both halves remain attached.