Luckily, our class' nude model didn't find it creepy/perverted when I asked her if I could videotape a few seconds of her doing a simple action for my final project. I then drew out each frame of the video to make the animation. The second half is kind of fun because you get to see how many drawings it takes to make a short animation.
The first part was done with a brush, walnut ink, and memo pad. The second part was done with a piece of charcoal and more memo pad paper.