A demurrer is of two kinds; general or special. With respect to the effect of a demurrer, it is a rule that a demurrer admits all such matters of fact as are sufficiently pleaded. Again, it is a rule that on a demurrer, the court will consider the whole record and give judgment for the party who, on the whole, appears to be entitled to it.
Thighs hurt only when sitting. When I sit, the back of my legs (both)ache. It hurts between the back of the knee up to the butt (the thigh muscle). But more just above the back of the knee. Also more when I sit on a soft couch or chair, opposed to a hard chair. When I stand, walk or run, even for miles.
The gluteus maximus is attached to the coccyx as well as to other bones. A spasm or tightness of this muscle can pull on the coccyx and cause pain when you move into a sitting position or raise yourself. It doesn't cause pain while you are sitting. The spasm, and the pain, is normally just on one side.