Wow. Um, this would probably be something I would keep my mouth shut about, if I was in your position. Of course, you could always let me know the name of the school, the professor, and the student. Then the Dean can look forward to an anonymous call about some ethics issues.
The only problem I see is that if I was a teacher tagging a nice piece of student ass, I'd strangle the bastard that ratted on me.
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The giant three-phallused phallus of Uzbekistan will one day squirt the cosmic jizz of revenge all over Canada.