Who Slept with Who in Friends?
Out of the six friends, there are only two couples (that we know of) who have slept together - Ross and Rachel and Monica and Chandler. Phoebe and Joey have not slept with any one of the six, but there have been times when it was implied that they slept with each other, though we are not sure this ever happened. Joey and Rachel tried to sleep together when they are dating briefly but they never went through with it.
Ross and Rachel
Ross and Rachel have slept together, thanks to their on-again, off-again relationship that spanned the entire ten years the series was airing. Their first relationship lasted for 12 months, and Ross counted that they slept together 298 times. The couple broke up but got together in Season 4, where they slept together once but then broke up again. The couple has casual sex along the show’s seasons until they accidentally conceive their daughter, Emma. Ross and Rachel get back together during the series finale, which makes it safe to assume that they continue sleeping together then.
Monica and Chandler
Monica and Chandler first had sex when they were in London for Ross and Emily’s wedding. They eventually started secretly dating sometime after they got home and eventually got married in season seven.