They are told that they are not emotionally ready to have sex at 16. That is probably true. But I’ve known 40-year-olds who were not emotionally ready to have sex. So what is the best age to start having sex? That is entirely up to you. No arbitrary number can be chosen by governments, religions, schools, parents, friends, or even me. I am not going to say that age is just a number. The people who say that usually seem to prefer lower numbers. I cannot tell anybody when they should start having sex. I don’t think anybody can tell anybody when they can start having sex. That is up to the individual.