I love this O here at the top of this line. I mean. Usually an O has an emotional quality – like a groan or a grief or a moan or a surprise. It feels like a raw expression of emotion.
In this case, though, it feels more like a way to minimize. The way someone would say, “Oh you know, just enjoying the scenery” when asked what they’re up to. It’s so – casual almost.
The only other O I can imagine would be a sort of stalling O…an O that suggests that you need to think for a moment…maybe so you could come up with a good excuse, or a good lie. It’s certainly not the O of a lover or a wounded man.