Drabble
It wasn't that Jack Harkness didn't know how to love. It was that he didn't. He didn't do love simply because he was afraid of it. He treaded on the edge of the water just experimenting. Love, loss, and anguish.
Back where Jack came from, love was nothing. People snogged, shagged and married only to break up one week later. In time, people stopped marrying altogether. Commitment was useless; monogamy was absurd.
There was only ever one person who taught him what love was. What a ride that had been.
That was why Jack Harkness swore never to love again.