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 abs and muscles of the lower back are also prone to muscular imbalances. The abs are typically weak while the muscles of the lower back are put under a lot of stress from sitting. And if you also have tight hamstrings, your lower back will start to cave in, protruding the stomach. This is called lordosis. Knee and hip pain can also result from muscular imbalances in the legs.