Answer:
There are various surgeries that can be done to allow you to give yourself oral. One surgery that is most common is the removal of the bottom ribs. this gives the person increased flexibility and allows them to pleasure their genital area
No one is going to have ribs removed so that they can do themselves. Either you can do it or you can't. Ribs are not the problem, fexiblility in the spine is the problem. Stretching, Yoga may help or not.