FURVERT!

animal_genitalia animal_penis anthro balls biceps big_muscles big_penis biped easyspark equid equine equine_genitalia equine_penis erection flexing fur genitals hair hooves horse long_penis male mammal masturbation muscular muscular_anthro muscular_male nude pecs penile penile_masturbation penis presenting rainstorm_(marefurryfan)solo standing tail thick_penis vein