Tandem Pissing Rule 34 rule 34 absurd res animal genitalia animal penis anthro balls big penis blue eyes bodily fluids brother brothers canid canine canine genitalia canine penis canis creek domestic duo erection forest forest background genital fluids genital piercing genitals german shepherd herding heterochromia hi res knot knot in sheath male malemale mammal nature nature background nipples pastoral peeing penis piercing plant possumpecker public sheath sibling spartie tandem pissing tree urine watersports yaoi 7545652