10 More Annoying Mistakes You Never Noticed In Friends
8. Phoebe Had Seen Rachel Kiss A Girl
In "The One With Rachel's Big Kiss" in Season 7, Rachel tries to tell Phoebe that she kissed a girl, Melissa, in college. Phoebe doesn't believe it though, saying that Rachel is "so vanilla" that it was probably just a peck on the cheek. No matter what Rachel says, she can't convince Phoebe that she has kissed a girl. Not until Melissa admits it too.
However, it shouldn't be so hard to believe after "The One With All The Haste" in Season 4. In this episode Monica and Rachel claimed their apartment back after having traded it with Chandler and Joey earlier. In exchange for letting them stay, Monica and Rachel offer to kiss for a minute. We never get to see the kiss, but Phoebe was there when they offered and in the next scene Joey and Chandler walk into their apartment while Joey says "that was one good minute".
So it's safe to assume they kissed and Phoebe was most likely still there to see it. So how can she later be so adamant that Rachel would never have kissed a girl?