This LiveJournal-er is a former Mormon and analyzes all the LDS symbolism and motifs in the series. Unsatisfied with the description of the final consummation, the blogger writes what she thought happened the first time Bella and Edward had sex:
A unicorn comes to Bella and pierces her ladyhood with its majestic horn, completing the journey from girlhood to womanhood. Edward admires the sparkle on the horn while making sand sculptures in a glass jar. Bella and Edward stare longingly into each others eyes until Edward hollers out, “Hey, Kool-Aid man!” and then Kool Aid man bursts through Bella’s hymen.