So, I had time to kill before work one day and went down to see what Zach was playing. He was playing Dragon Age: Origins, at which point he was like 'Oh, hey, I have to show you the gay sex thing.' '...What?'
Apparently, in the game, you can seduce (though there is argument over who is doing the seducing) the elf, Zevran, that you apparently refuse to kill. He joins your party and at some point, this can occur:
And, from further research (and I might just have to watch my brother actually play this game through) your character can also end up pretty much engaged to Zevran.