Virginity is sacred in many ways, but one of them is for the emotional bonding. Imagine you found the love of your life, you may feel happy but you will NEVER be her first, she will keep that memory of banging some 6'5 jock in college. People tend to remember their first session of sex over anything else. There is nothing sacred or special about being the 45th person she had sex with, the 1st person will always be.
