Unless one is very strong in knowledge, patience and proper bodily, mental and intellectual behavior, controlling ones lusty desires is extremely difficult. Thus after seeing a man embracing a young woman and practically doing everything required for sex life, even a fully qualified brahmana, as described above, could not control his lusty desires and restrain himself from pursuing them. Because of the force of materialistic life, to maintain self-control is extremely difficult unless one is specifically under the protection of the Supreme Personality of Godhead through devotional service.