You know how people sometimes rub statues for good luck? Well some sick people like to rub statues the wrong way, and the beautiful aged patina on some fine statuary has been ruined by perverts.
It seems some people can't keep their hands to themselves, thinking they're being funny and/or original when they grab the bull by the opposite end of the horns.
Their egregious groping has forever marred these magnificent statues, and until we start dressing these statues up in spiked bras and codpieces the statue molestation will continue...
See 16 Statues Around The World Polished By Perverted Tourists here (Warning: contains nude statues)