rule 34 2019 animal genitalia anthro black body black tail cetacean dated delphinoid erection famir artist front view genital slit genitals grin hand on head looking at viewer male male only mammal marine muscular muscular anthro muscular male narrowed eyes nude oceanic dolphin orca outside partially submerged legs penis red penis signature slit smile solo standing striped arms striped legs tapering penis toothed whale waterfall white body 6705738