rule 34 2017 abs anthro balls battle peanut biceps biped black fur black nose black tail blue eyes blue fur blue tail carpemortem artist digital media artwork erection eyebrows flexing front view fur grey background grey balls grey fur grey tail hi res humanoid penis kangaroo long tail looking at viewer male male only mammal marsupial multicolored fur multicolored tail muscular muscular male navel nipples nude pecs penis pink nipples portrait simple background snout solo standing three quarter portrait uncut 2445743