Based on the fanfic in this fandom, it seems to be a lesser-known fact that dog owners need to close the door when they have sex or masturbate, because unlike cats (who don't seem to care), dogs want to Join In The Play Wrestling! Oh Boy! Also, they will stick their noses in your crotch or the general vicinity of your crotch (as dogs are wont to do anyway) because Hey That Smells Different From Usual!!!

So: canonically-existing Dog (Makkachin or Vicchan or Seung-gil's husky) interrupts Character or Pairing of your choice. Everything is great, or at least okay, until suddenly Cold Wet Nose.

Maybe Victor has Chris over. Maybe teenage Yuuri is spending some quality time with his poster collection, or trying to get past second base with Yuuko and/or Takeshi. Maybe Yurio is dogsitting for Victor and Yuuri and they /didn't warn him, the jerks/.

DNW: Pretend or actual bestiality.