Greta Christina specifically addresses the meaning of sex from within a materialist’s mindset but her points can extend to more aspects of our experience as well, I think. The transcendent aspect of sex and of numerous other aspects of our experience can be derived from our meditative realization that we are participating in processes that are our existential conditions and which we share with the rest of the animal kingdom and with our fellow humans as the practices by which and in which we live and move and have our being, so to speak.
According to a materialist viewpoint, the capacity for transcendent sexual joy is hard- wired into our brains… and it’s deeply and powerfully hard- wired, as a crucial and central feature of our lives, by hundreds of millions of years of evolution. And this doesn’t just mean that suppressing or trivializing sex is stupid and futile, dangerous and harmful, a cruel and pointless crusade against the deeply- laid grain of our nature. (Although it certainly does mean that.)
It means that the act of sex, and the experience of sexual pleasure, connects us to every other living thing on earth. We are the cousins of everything that lives on this planet, with a common ancestor of primordial soup going back billions of years… and we are all related, not entirely but substantially, because of sex.
When you don’t believe in God or the soul or any sort of afterlife — when you believe that this short life is all that we have — then making the most of that short life, and taking advantage of the joyful experiences it has to offer, suddenly becomes a whole lot more important. It’s almost a moral obligation. The odds against you, personally, having been born into this life, are beyond astronomical. Are you going to waste that life by not giving yourself, and other people, as much joy as you possibly can?
Now, this doesn’t mean, as many anti- atheists claim, that without a belief in God or an afterlife, we can and would behave entirely selfishly and with no moral compass. It doesn’t mean that even a little bit. But it does mean than we can base our morality — including our sexual morality — on how our behavior demonstrably affects people in this life, and not on how it supposedly affects invisible beings in an unproven hypothetical life after this one. And it means that — as long as we don’t cause harm to people in this life — it is not only acceptable, but a positive and meaningful good, to engage in any activities that bring joy and epiphany and meaning to ourselves and the people around us. Including, and maybe even especially, sex.
I don’t think we need to see sex as blessed by the Goddess, or a telepathic connection between souls, or a channeling of the chi energy, or as any form of worship or spiritual practice, in order to see it as valuable. I think we can see sex as a physical act between animals… and still see it as richly, deeply valuable and meaningful. I think we can see sex as a physical act , and still see it as an act that connects us intimately, not only with ourselves and with one another, but with all of life, and with the expanse of history, and with the vastness of the universe.
For more from me on the topic of meaning in a godless universe, see my post on Commitment To Value Without God.