OK, so Sean wasn't exactly a virgin when he competed for Emily Maynard's heart or when he found love on his own season of The Bachelor. However, he had been celibate before going on either season, so he was dubbed the born-again virgin. When it was time for his Fantasy Suites, a big question was whether he would have sex with any of the women, a speculation that he found "annoying and tiring."
Now Sean is married to Catherine Giudici, to whom he gave his final rose, and they have two sons together. So that should clear up any lingering questions you may have.