I'm always looking, as an actor, for activities. I think it's far more interesting to watch what people do than what they say. You always want to watch behavior, because the dialogue as written by our illustrious leaders is great. Eminently playable.
I think that the two of them have been doing this for a really long time and it is more like sport. Yes, they would love to find a lasting relationship, but it's not likely to happen the way they are going about it.