They're not they are useful
The space between his navel and pubic area. the back of his neck, the palms of his hands, and the curve in his back right above his butt... There's more but i can't think of any more.
LSD (acid) can be absorbed through the skin.
no, they just suck. i highly recommend a suspension lift.
You'll have lots of health problems in your brain, lungs, etc.