The One With Joey's Fridge - S6-E19
Corrected entry: In Season 2 Episode 1 'TOW Ross' New Girlfriend' Joey is talking about how his tailor did his first pants when he was either 15 or 16. He wasn't sure and said 'When was 1990?' Indicating that he was 15 or 16 in 1990. In Season 6 Episode 19 'TOW Joey's Fridge' It was revealed that in 1981 Joey was 13. Which means that Joey was born in 1968. If Joey was born in 1968, then in 1990 he was 22.
Correction: He never says that in 1990 he was 16. He was asking when was 1990 to have a time reference, and then calculate when the event happened in relation to that.
Dr. James