There are a lot of relationships from Friends we'd like to talk about (and in fact, we will), but Brooke Shields' cameo as an obsessive Dr. Drake Ramoray fan (who Joey dated despite knowing she was a stalker and that she believed he was actually Drake Ramoray) caused some bonus real-life drama. In her 2014 memoir, Shields wrote that real-life boyfriend Andre Agassi was so jealous after she licked Matt LeBlanc's hand on the show that he went home and smashed all of his tennis trophies.
Malcolm and Phoebe
Remember when Phoebe started dating the guy who was stalking her identical twin sister (who was also Courtney Cox's then boyfriend, David Arquette)? She thought that if he started dating her, he might stop stalking Ursula, and surprise, he did not.
Monica and Young Ethan
Sorry, sorry, one more Friends one, just because we can't forget that time Monica accidentally dated and SLEPT WITH a 17 year-old in season one. She told him she was 22, he told her he was a "senior," and the whole thing was, as Monica correctly said, icky!
Ross and Rachel
He basically stalked her for years, he terrorized her potential new dates, he acted as if he possessed her, and he made her give up a dream job in Paris just for him. We cannot support this!