I can be wrong, but althought this hasn't been really showed I think he also forgot the girl on Ross's wedding episode who Joey slept with. Joey asks Chandler something like: who are supposed to have sex tonight: you or me?. And at this time, Chandler was at room with Monica.
Anyway, it was a really nice idea and work, but could be much better if he consider all the suggestions above.
On The Sexual Proclivities of Friends
I can be wrong, but althought this hasn't been really showed I think he also forgot the girl on Ross's wedding episode who Joey slept with. Joey asks Chandler something like: who are supposed to have sex tonight: you or me?. And at this time, Chandler was at room with Monica. Anyway, it was a really nice idea and work, but could be much better if he consider all the suggestions above.