Still here? Excellent!
If you were to Google image search vagina dentata (and I'm not suggesting you should, so don't blame me) you would find this pic making a regular appearance:
I can't think why. It is the Sarlacc pit from Star Wars: Episode VI - Return of the Jedi. I, for one, am very impressed by George Lucas' creativity in this scene.
Always interesting to observe the grotesquification of the female anatomy in pop culture. This particular incarnation seems to give the woman involved a fair bit of power in relation to the predatory males she inevitably encounters.