Where did Appendix Carry come from?

All “ima shoot my dick” jokes aside, where did appendix carry come from, and what are the benefits? It doesn’t seem (at least to me) to have any tangible benefits over any other position, but everyone who does carry appendix that I’ve talked to refuses to carry any other way.Edit: wait, is appendix carry only 12 o clock, or is appendix just carrying between 9 and 3? via /r/CCW https://ift.tt/2LQKwy9