Turbulence bothers me, too. I prefer the window seat, so when we hit air pockets, I've got a perfect view of the wings flexing. I know the engineering is sound, but the primitive part of my brain is running in circles, screaming in panic. "Are they supposed to bend like that? How much does it take to snap them off?" The answer: quite a bit. In fact, a lot more than you'll ever experience.
Here's a good article on aircraft testing. Below is a video showing wing stress tests where the wing finally snaps at 154% of its design rating. The real bending starts around 1:40.
So fly in relaxed comfort, my friends. Thanks to the math, physics and engineering discoveries of Christian Europeans*, the elements aren't going to bring you down.
* - Yes, I had to get that in. ;-)