rule 34 2018 3 toes acoustic guitar alpha channel anthro avian ball tuft balls black feathers digital media artwork dinosaur elbow tufts erection feather tuft feathered dinosaur feathers guitar hi res looking at viewer male male only multicolored penis musical instrument nude penis plantigrade rainbow penis shaded shoulder tuft simple background smile solo standing tapering penis thehuskyk9 artist toes transparent background tuft watermark yellow eyes 2887241