HA! Did you watch "friends" when it was on?I will be your designated drinker!
When Phoebe is carrying triplets as a surrogate for her brother and his wife, she has a craving for meat (and she's vegetarian), and she's racked with guilt. So Joey -- the ultimate carnivore -- offers to go vegetarian during her pregnancy so she can eat meat, but she's eating the meat HE would eat, so no additional animals would be killed.
It was so damn sweet of him!