Matthew Perry messes up a line by saying "blue blazer black" instead of "blue blazer back". The rest of the cast's responses were so funny that they left it in the episode.
Women's health sites have listed Monica's 7 erogenous zones as the ears, the lips, the neck, the breasts, the buttocks, the inner thighs, and the vagina. Chandler's surprised reaction is likely to the ears.
Fourth episode to include Phoebe's name in the title.
Teri Garr and Paget Brewster both appear in this episode but not share any scenes together. They would play sisters in Unaccompanied Minors (2006).