The Big ImageBoard (TBIB) - 3:4 all fours ambiguous gender ambiguous penetrated ambiguous penetration anthro anthro on anthro anthro penetrated anthro penetrating anthro penetrating anthro biceps bodily fluids canid canine canis clenched teeth countershading docked tail doggystyle domestic dog duo eyes closed from behind position fur grey body grey fur grey hair hair hand on butt hi res long ears male male/ambiguous male penetrating male penetrating ambiguous mammal mastiff molosser motion blur motion lines musclegut nipples onomatopoeia orange body orange countershading overweight overweight male pecs penetration rottweiler sex snoopjay2 sound effects sweat teeth text thrusting wrinkles