For all the nonbelievers out there, is sex something just for pleasure? Or does it still have a spiritual aspect to it?
Sex is for procreation, not pleasure. It happens to be pleasurable because that's how evolutionary pressures have got us to engage in it. Spiritual? you need to define what you mean by spiritual.
Sex is for pleasure, but it's even better with an emotional content. I hesitate to use the word "spiritual".
There is no Holy Ghost making it a threesome!