rule 34 anal anal sex anthro anthro on anthro anthro penetrated anthro penetrating anthro penetrating anthro ass backsack balls bareback blue body bodily fluids canid canine canis clenched teeth clothing comic dialogue domestic dragon english text genital fluids genitals group hat headgear headwear hi res horn kristakeshi male malemale male penetrated male penetrating male penetrating male mammal mastiff molosser muscular muscular anthro muscular male penetration penis precum reyes rottweiler speech bubble tagme teeth text tongue tongue out 4632113