DAE get really motion sick from playing FPS games?

So much so that you avoid them? Ever since I can remember (even back in the Duke Nukem 3D days) I get sick enough to end up laid up in bed, even from just watching someone play. 3rd person view (like in MMOs) doesn't bother me as much. I recently tried playing Resident Evil 5 in co-op mode, ug! The b/f and I both got sick after 10 mins!