It is a frequent debate in fandom (especially during the Tenth Doctor's era) as to what, exactly, the Doctor's sexuality is. He's displayed some tendency towards kissing women, but then there's the whole Master business. And Jack, I mean, really.
So what is it? A Gay Agenda? A Straight Agenda? Is the Doctor really asexual? Why is fandom split on this?
So, to simplify, I've created a handy dandy chart of the Tenth Doctor's episodes and any romantic tendencies therein by the Tenth Doctor.
5-Connecting (edit: Psychically)
Positive on number line for Heterosexual, Negative on number line for Homosexual.
Thanks to quitehomoerotic for help with photoshop when the stupid chart program would not work.
EDIT: If there were two actions to opposite genders, I cancel them out. Say, in Parting of the Ways (which is not on this chart), it would get a rating of 0, because the kiss the Doctor had with Jack was canceled out by the kiss he had with Rose.
Doesn't it all make sense now?