FURVERT!

age_difference anal anthro balding big_butt bird's-eye_view black_body black_fur bottom_heavy butt butt_slap canid canine canis clenched_teeth doggystyle domestic_dog duo elderly_male from_behind_position fur grey_hair grin hair hi_res high-angle_view hot_tub human kangal lens_flare livestock_guardian_dog looking_at_viewer looking_up male male/male mammal mature_male mohawk molosser motion_blur mountain_dog narrowed_eyes oddkangal older_male outside outside_sex pastoral_dog river_(oddkangal)sex sex_in_water slap smile spanking squint tan_body tan_fur teeth voluptuous_male water water_ripple