Friends: The Worst Thing Each Friend Has Done!

Passion, love, and romances are such delightful things and a big component of what made Friends such a loveable show. Sadly, love also walks hand-in-hand with heartbreak, especially when crossover rears its ugly head. That's what made this moment feel like a massive betrayal from the best duo in the show.

During season 4, Joey found himself a great girlfriend in the form of Kathy. She was smart, funny, pretty and a lot of fun, which is why Chandler found himself falling for her too. He fought against his feelings but let them slip out all the time (such as when he bought her an incredibly thoughtful birthday present without thinking of the implications).

At first, it seemed that this would be a tragic unrequited love for Chandler, but things took a tumble down awkward lane after he discovered that she had feelings too, and the pair shared a kiss. This, naturally, led to Joey and Kathy's break-up and caused a massive dispute between Joey and Chandler.

It's true that Chandler regretted the kiss and came clean, which was a good thing to do. But still, his actions were selfish and endangered his friendship with his bestie.