Is there anything yuckier than your femur? I mean besides earwax. And your gall bladder. And your colon, and your lungs and your liver and your carotid artery. And your heart, your pancreas, your kidneys, your feet, and that fungus that lives under your toenails.
Oh, and your brain, and your thyroid gland. Pretty much ANY gland in your body is awfully gross, actually. Not to mention your naughty bits, and that extra ten pounds of fat around your middle. Yuck!
Eyeballs are pretty gross, too–especially on the inside. And your tongue? Ewwwwww.
You know, come to think of it, the femur may be the LEAST disgusting thing in your body. Carry on.