Norms in todays world

After a great in class example of how saliva is exchanged in socially acceptable ways, and the left handed shakes which was a huge mind bottler; I realized that we have a lot of norms in our society that have been used and passed one for generations. We also learned in certain situations we change and adapt to societies norms if we need to like learned in the cannibalism article. The way they ate each other had to become more socially acceptable because they were not blood hungry insane cannibals. they ate each other in a more adaptive social acceptable way???? what i mean is the event of cannabalism had organization. It wasn't complete chaos, it was what they had to do to survive, and they did it in more organized and adapted way which to them would seem more acceptable. We wont eat eat saliva on the wall but we will go suck it out of someones mouth. That is socialy acceptable for some reason. When the time comes for change in societys norms we will adapt and do things that we have to do to survive. I dont really know what im trying to say so basicallly im just gonna lay it out. Norms and normality when changed do not become not normal. they just adapt and change the meaning of normal.. yepp