Never. Since you can ask us questions here, it proves that your heart is tangled and outsiders can see it clearly. We definitely advise you not to, because the first time is very precious, don't just give it when you are in love. This is too humiliating for yourself. You should know how to love yourself. Or you may meet someone who loves you, but you have to pay when you are stable. Chastity is the most precious thing for girls.