anthro balls big_balls big_penis blue_eyes flexing flexing_both_biceps floppy_ears fur genitals gym half-erect male muscular muscular_anthro muscular_male nipples nude penis pubes solo standing tan_body tan_fur weights ravenouspaw canid canine canis domestic_dog mammal
from RavenousPaw's deviantart:
h4.Nude dog flexing at the gym 2