FURVERT!

2:1 anal anal_penetration animal_genitalia animal_penis animated anthro balls bodily_fluids bound canid canine canine_genitalia canine_penis canis cum dos erection examination_room flash fucking_machine garek_maxwell genital_fluids genitals helpless inside knot laboratory legs_up loop lying machine male mammal no_sound nude on_back penetration penile penis penis_milking probing solo urethral urethral_penetration wolf