How do you turn your peni s black?

Keep on wanking like no tomorrow.. xD well, wank like twice a day for 3 months and tht will 100% get u results since the reason why it turns black is due to over use. the skin streches often and then goes back to normal and this causes it to turn black. i remember some1 saying this and its true, the other one saying dip it in ink was funny hahaha