Fellatio performed on a male when he is bent over and has his genitals tucked between his legs, pointing straight backwards. This allows the person performing this act to get a face full of butt while blowing the male and the male can expell any and all bodily fluids and odors behind him onto the person performing the act. Which fluids and odors expelled are up to personal preference with none also being an option.
Why is our neighbor bent over the couch? Probably getting ready to give his wife the ol' exhaust pipe fix.