FURVERT!

2:3 anal anal_penetration anthro anthro_on_anthro anthro_penetrated anthro_penetrating anthro_penetrating_anthro asinus bigdaddy butt darkgoose donkey duo elephant elephantid equid equine genitals hi_res male male/male male_penetrated male_penetrating male_penetrating_male mammal muscular nipples penetration penile penile_penetration penis pose proboscidean proboscis_(anatomy)sex slightly_chubby slim trunk_(anatomy)tusks