» Valentine's Day

Love is a man and a woman ... and often on our favorite prime-time shows, another man or woman thrown in to add some drama, passion and intrigue to the mix.

From one of the first night-time soaps ('Peyton Place') to one of the most popular sitcoms of all time ('Friends'), TV series have kept us watching by keeping true love from running its course -- in the most entertaining (and treacherous!) ways.

We count down the 20 hottest love triangles in TV history.

Lucy and Ricky ... Marge and Homer ... Buffy and Angel ... find out where they rank on our list.

Love is in the air, which makes it the perfect time to take a walk down (lovers') memory lane with 20 of TV's all-time best couples.

What makes a great on-screen pairing? Well, there's the banter (i.e., fighting), the chemistry, the heartbreaks and makeups, more fighting ... and don't forget the, uh, hotness factor.

From the will-they-or-won't-they duos of 'Cheers' and 'Moonlighting' to current faves Jim and Pam and Mer and McDreamy, these tube twosomes all have one thing in common: We love to love them, baby.