Rule 34 Dev - 2017 anal anal_sex anthro anthro_on_anthro balls bit_gag bound dildo dildo_sitting duo equid equine erection frottage gag hair horse hybrid kamalaja male male_penetrated mammal medial_ring navel nipples nude pecs penetration precum queervanire sex sex_toy slave submissive_male tikki_(zonkey) yaoi zebroid zonkey|3472421272