Here's a tastefully done blog on sex and physics: The Physics of Sex: Where Science and Intimacy Collide. They discuss what beds are best, how lubricants work, optimal strategies for mating based on network theory, and so on. It's a lot of fun. Even safe for work.
More like this
A few weeks ago PNAS published a paper on the evolution of snake sex chromosomes. The authors compare snake sex chromosome evolution with that of mammals and birds.
A few months ago I wrote the following:
Yet another piece of evidence for the futility
I'm tempting the fates by putting my words above the fold this time.