I found a small toy magnifying glass today.  About the size of a silver dollar and made of plastic.  Looked like a toy.

Had to try it out on my cock head.  wanted to see what sort of reaction i would get from bright sunlight focused on my cock head.  it hurt some, but not as much as striking with a dragon tail single whip.  Of course the longer it is focused in one spot, the hotter it gets.  i have numerous red very small spots and a couple of blisters.  Best thing is to keep it moving.    i think i will experiment some more sometime.