Intelligent Design Stupid

why did God intelligent design the ball sac to be outside the body ?its so annoying?
i mean why couldn’t they just remain inside the body and have an internal temperature regulating system? seriously, being on the outside is just stupid. they’re always getting hurt, and squished in jeans and stuff. it just seems like a bad idea.
@ the GMC – because evolution is random and un-intelligent. unlike God who is all-knowing and would surely make a better design.
Maybe for the same reason Videogame-Bosses have big glowing weak spots.
Neil deGrasse Tyson-Intelligent Design? Stupid Design