As long as it takes for both you and your partner to want and to feel comfortable having sex. What’s right for one person is not right for another so don’t rush into anything. If your partner won’t wait or is putting pressure on you to have sex, they’re probably not the right person for you. You should always have a choice about whether or not to have sex. If you both decide that you want to have sex and feel comfortable about this, make sure you use contraception and a condom. This is especially important with a new partner when you know less about them and their sexual history.