Have anyone's knees experience pain when they sit down the way they do in the guard? It does not matter if I'm doing BJJ or not, whenever I try to sit in that style my knees will hurt, therefore I cannot sit my butt 100% tight to my feet. And when I am in someone's guard, I will have to carry the weight of my opponent's legs then my knees becomes more painful. Does anyone have that problem? How do you deal with it? Thanks in advance.