The One With Rachel's New Dress - S4-E18
Trivia: In the one where Rachel wears the nightie to the restaurant, the man playing Joshua's dad is John Bennett Perry, Matthew Perry's real dad.
The One With Rachel's New Dress - S4-E18
Trivia: Joshua - Rachel's boyfriend in this and a few episodes either side, was in fact Jennifer Aniston's boyfriend around that time.
The One With Rachel's Crush - S4-E13
Trivia: This was the first episode in which Joey uses his trademark line "How you doin'?".
The One With The Embryos - S4-E12
Trivia: Chandler's line of "Donald Trump wants his blue blazer black" was a genuine flub by Matthew Perry. Everyone's reaction to it was so on-brand for their characters that they decided to use it it for the episode.
Answer: The statements that she's contradicting (that it is common, it happens to every guy, and it's not a big deal), are the things that a woman commonly says to a man who is suffering from erectile difficulty, typically to assuage his bruised ego. However, most men do not believe that these statements are true, as evidenced by Chandler's outburst. He's so caught up in the proof that women are lying about it that he gives himself away.
Rooster of Doom