Only stupid people or little kids get motion sickness Edit ****
Kids get motion sickness because they're still getting used to what the world is and how they exist in it, Adults get motion sickness because they're too stupid to comprehend they're moving even while sitting on their butts.
Edit for those who don't understand why : I equate self control and will power to intelligence. Both of which have been able to subdue the effects of motion sickness in people . Some people.