Would you rather, put two knives in the bottoms of your foot, and be forced to walk while the knives are in bedded in your flesh, or be hung by your hair(if your bald then you'll be scalped) and have your nails be pulled out of your fingers. Hard Huh.
This Nahh, but you have to do it convincingly enough for him to cumshot you. And with the grandparents, your grandad has a noticable erection. Handjob for your dad (looking him in the eyes then cums on your face) Or Striptease for your Grandparents while your Grandmother gives your grandad head then he comes on your back. Better?
Well since I have no idea what "in bedded" means, I'll go with that. You know, since it doesn't exist.
Not hard at all, realistically hair is your best bet. Why? Because your hair can support your body weight and it certainly doesn't hurt to be suspended by it (the things I did when my hair was nearly a foot long). Walking on knives wouldn't hurt provided they were spread with enough space between so that you walked steadily and weren't touching a nerve directly. Having nails pulled sucks, I would know, I used to do it intentionally.