Don't have sex life more than it is required. They are allowed. Just like Kṛṣṇa says that, "Sex life which is not against religious principle, that is I am." Sex life against religion, what is that? Avaidha-strī-saṅga. Avaidha, illicit sex life, that is against religious principle. Otherwise, to get married and to beget nice children, Kṛṣṇa conscious children, according to śāstra, that sex life is not forbidden. Kṛṣṇa says. So dharmāviruddhaḥ kāma aham, "Which is not against religious principle, that kāma, that kind of lust, I am." But not for other purposes.
In this we have to mold our life if we are actually interested to become free from this janma-mṛtyu-jarā-vyādhi-duḥkha-doṣānudarśanam (BG 13.9), if we actually want to get free from the repetition of birth, death, old age and disease. That is our real problem. People do not understand that this is our real problem. They are simply engaged in some temporary problem. The real problem is that, "Why I am dying? In the Bhagavad-gītā it is said, na hanyate hanyamāne śarīre (BG 2.20): 'The soul does not die even after the destruction of this body.' So why my body should be destroyed?" This is real inquiry.