There is a right way and a wrong way to cut a cake. Chances are you, and most everyone you know, have been doing it the wrong way your entire life.
This video from YouTube user Numberphile explains and demonstrates the proper way to cut up a delicious slice of cake so that when you store the leftover pieces for later they stay moist.
No one wants to eat leftover cake that has become crusty, hardened, and dried out, so check it out!