Season 9: Episode 216: The One in Barbados (Part II)
The weather in Barbados is finally nice, but only during Ross's speech. Rachel and Joey giggle over the term "Homo-Erectus." After the speech, while it rains again, Monica and Mike get into a ping-pong match and their competitive sides really take over. Monica hurts her hand, so Chandler finishes for her -- and wins. Joey and Charlie realize they don't have anything in common, and break up. Joey learns of Rachel's feelings for him, but doesn't feel he can do anything about it because of Ross. Meanwhile, Ross and Charlie spend more time together, and realize their feelings for each other. They kiss; Joey sees them, and decides not to let Ross stand between himself and Rachel. He returns and kisses her.