Friends (1994)
Season 2, Episode 7: Rachel was cleaning up, Ross didn't get a cat, argument ensues, and they kiss.
*Not counting kisses of friendship or rejection, not counting dream kisses or alternate reality kisses (that one's for you X-Files fans), and only one couple per show.
Discuss here: http://www.imdb.com/board/bd0000088/thread/223427638