If the husband and wife can voluntarily restrain by powerful advancement of Krishna Consciousness. That is the best method. It is not necessary that because one has got wife, therefore you must have sex life. The whole scheme is to avoid sex life as far as possible. And if one can avoid it completely then it is a great victory for him. Married life is a sort of license for sex life on condition of raising children. So you should try to understand these principles of married life and use your discretion. You should not imitate great personalities like Bhaktivinode Thakura, but you must follow His footprints.
Letter to Satsvarupa, 20 September, 1968