Rule 34 Dev - ahotandsweatydog anthro balls bulging_testicles canid canine canis domestic_dog erection genitals goo_(disambiguation) hi_res inside_balls male male_only male_urethral_insertion mammal nipples nude penetration penile penile_penetration penis simple_background slime tentacle urethral urethral_insertion urethral_penetration|5959681712