> Even though we fix our own betel-nut, we get burned.
Chemachel is a "betelnut package" consisting of the seeded nut, the pepper leaf (kebui), and the lime (chaus). By applying too much lime to a "package" it is possible to burn one's mouth. Although this is sometimes done among young people to signal another secretly of sexual attraction, typically it happens accidentally. The idiom implies that everyone makes mistakes; it can't be helped. No matter how careful we are, we sometimes fail; we shouldn't be too sure or overconfident in ourselves.