Stories by Bill Gaston.
Quickie Recap: How can you really recap a book of short stories, except to say that there's a range of emotion here that is quite impressive. However, there is a unifying theme of internal struggle, a feeling of alienation, a yearning for something that perhaps was never quite yours to begin with.
Quickie Review: I would agree that sex is red, but sex isn't the only thing that's red, and in the story in question, I doubt whether it's only sex being referred to. There are shades of subtlety, of quiet revenge, of quiet rage, even, for lives lived not quite right. I was bowled over by the very first story and just kept on truckin, delighted to have found a new (to me) Canadian voice that actually has something to say.
Quickie Recommendation: Worth the perusal.