Is sucking a cut finger, good?

Saliva which is secreted in the oral activity contains many substances which have antibacterial and antiviral activity. These include immune globulins such as IG-A, G, M which help clump the bacteria. Also there are lysozymes which destroy the bacterial cell wall. A protein lactoferrin found in the saliva also help in inhibiting multiplication of bacteria by interfering with iron utilization by the germs. The physical effect of sucking out the infecting material implanted during the cut also plays an important role. Forcibly bleeding the finger and flushing it with running water is equally effective in prevention of bacterial contamination. Even though the biochemical contents of saliva are good, the microbiological contents are not. The oral cavity has been recognized as an area of dangerous microbial contamination and exposing the skin with a cut to such an environment might be inviting trouble.