Most of the original file is her practicing her oral skills on a huge dildo, but the last couple minutes she rubs up against it. There were a few spots where she's sitting in just the right position where it looks like it's her cock instead of a dildo. A bit of cropping and the illusion's near perfect.
Video: 1280x720, AVC (H.264), 9742kbps
File size: 118.6 MB