Someone repeatedly calling out, "OH MY GOD! OH MY GOD!" in your ear is enough to make anyone feel spiritual. It's called the power of suggestion.
It is no coincidence that we use the word "ecstasy" to describe orgasm and religious epiphany. The only other time you ever hear that word used is to describe the party drug, and that's only because the party drug feels like an ORGASM. This is some Illuminati shit. Where you at, Jay Z?
You only get on your knees for two things. Let's be real.
It's easy to believe in a higher state of being when you've just blown your load. There is really no state of mind more peaceful than that post-orgasmic glow. You're one with the world, contemplative, and serene.
Sex is profound, always. Sex is the most beautiful, intimate act that two (or more, if that's your jam) people can have together. And after an intense orgasm, you become very aware of the world around you and your small, yet important place in it.