4:3 all_fours anal anal_penetration anthro backsack balls breasts butt claudia_vial doggystyle duo equid equine female female_penetrated from_behind_position furball genitals herm herm/female herm_penetrating herm_penetrating_female intersex intersex/female intersex_penetrating intersex_penetrating_female laquine lying mammal nipples on_front penetration pussy raised_tail sex size_difference tail