Joey kisses Chandler at midnight on New Year’s Eve in season 1, episode 10- “The One with the Monkey”

Joey kisses Phoebe when he thought she was Ursala in season 1, episode 17- “The One with Two Parts: Part Two”

Rachel kisses Ross a lot, but the first time was in season 2, episode 7- “The One Where Ross Finds Out”

Ross kisses Joey to help him for an audition in season 2, episode 24- “The One with Barry & Mindy’s Wedding”

Phoebe kisses Ross and Rachel kisses Chandler in season 3, episode 6 – “The One with the Flashback”

Rachel kisses Monica (off screen) to get their apartment back from Chandler and Joey in season 4, episode 19- “The One with All the Haste”

Chandler and Monica kiss when they hook up at Ross and Emily’s wedding in season 4, episode 24- “The One with Ross’s Wedding: Part 2″

Chandler kisses Phoebe and Rachel to cover up when they caught him kissing Monica in season 5, episode 2- “The One with All the Kissing”

Chandler has to kiss Phoebe again when the “messers become the messees” in season 5, episode 14- “The One Where Everybody Finds Out”

Joey kisses Phoebe for her birthday in season 7, episode 14 – “The One Where They All Turn Thirty”

Phoebe kisses Rachel to find out what all the fuss is about in season 7, episode 20- “The One with Rachel’s Big Kiss”

Rachel and Joey kiss in season 9, episode 24- “The One in Barbados: Part 2″

Ross kissed Monica and Chandler kissed Rachel at a party in 1987, but they talk about it in season 10, episode 11- “The One Where the Stripper Cries”

All in all, Rachel kissed Ross, Joey, Chandler, Monica, and Phoebe- that’s everybody!

Monica kissed Ross, Chandler, and Rachel.

Phoebe kissed Ross, Joey, Chandler and Rachel.

Ross kissed Rachel, Monica, Phoebe, and Joey.

Joey kissed Rachel, Phoebe, Ross, and Chandler.

Chandler kissed Phoebe, Monica, Rachel, and Joey.