anthro balls circumcised fur genitals glans humanoid_genitalia humanoid_penis k9machina male muscular muscular_male nude_art nude_male penis pink_penis pose small_penis solo studio white_balls white_body white_fur bull_terrier canid canine canis domestic_dog hunting_dog mammal terrier
[u]Nude Modeling[/u]

Brutus posing as a life model for an art class.  It must be a treat for them to draw such a buff boy, and that sly look suggests he's anything but shy.  Still, it's a little awkward when the robe comes off and students get their first look.