It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "Allah knows that whatever He has declared unlawful, there will be those among you who will look at it with curiosity. Beware! I am holding you back by your waist to save you from falling into the fire of Hell, and you are falling into it just as moths or flies fall into it."