rule 34 2018 anthro anus ass ball tuft balls booboo34 canid canine canis daxx shirteater18 domestic flaccid genitals greyscale heart hi res licking licking lips looking at viewer lying male male only mammal monochrome muscular muscular anthro muscular male nipple piercing nipples nude on back outside patreon pecs penis piercing pit bull presenting presenting anus shadow shirteater18 sketch smile solo spread legs spreading tongue tongue out tree tuft 3945750