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.
But if you were to sit (actually more like reclining) on the couch like that, IÃ¢â¬â¢d bet that your back would hurt pretty quickly. Some people may feel fine while on the couch, but as soon as they get up, they feel a nagging ache or a sharp pain. You can be pretty sure that how you were sitting caused that pain.