Quote from Kelso in I'm a Boy
Brooke: So, how do you guys all know each other? Jackie: Well, Michael and I dated for, like, three years. Hyde: Then I stole her from him. Brooke: Wait. What? Kelso: Nah. You never could have stole her from me if I hadn't cheated on her first. Brooke: Okay, wait a minute. Kelso: That sounds a lot worse than what it is. I only cheated on her with Eric's sister. Well, and then the rest of the girls were when we were on a break 'cause I annoyed her. But none of those girls were anybody's sister, except for the two that were sisters. Hyde: He brought up the sisters. Awesome.