Maybe because I love pet monkeys, maybe because I had a stuffed animal called Marcel back in the day, but this is hands-down my favorite Friends Christmas episode, and maybe even my favorite holiday special of any show, more generally.
A young, Season-1 Ross introduces the gang to his roommate, Marcel the monkey, who is nothing short of adorable. The friends also decide to host a holiday party, and to make sure no one feel lonely, they make a pact that no one will bring a date to the affair. Of course, all the characters try their hardest to renege on this promise throughout the episode, but in the end, find themselves alone anyway.
What a deep metaphor for life.
Merry Christmas and happy binge-watching!