rule 34 1boy 2016 anthro balls black fur blue eyes blue hair chest tuft circumcised collar ear piercing erection feline fur genital piercing gradient background grey fur hair half closed eyes humanoid penis kittydee leash long tail looking at viewer lorum piercing male male only mammal muscular naughty face navel nude penis piercing ponytail shadow signature simple background sitting smile solo striped fur stripes tied hair tuft watermark white fur white hair 2104766