Quote from Hyde in Laurie and the Professor
Kelso: No way! Eric: Yep. Laurie and her professor, tonguing in the garage like hungry dogs. It was very disgusting. Kelso: No, no, you see, because Laurie wouldn't just make out with some old guy. She wouldn't do that. Hyde: No, it's true, man. I was in the upstairs closet trying out my cot, and I saw 'em. It was like live porno, but not good porno, 'cause he's, like, really, really old. It was like old, bad porno.