One dark and stormy night.
One small pup sleeping in his bed.
One married couple sleeping in theirs.
One silent poof from under pup's tail.
Two people now semi-conscious, gasping for air, scrambling, diving under the covers, fanning the air, coughing, choking.
Just as a little yeast leaveneth the whole bunch, so does a little poof stinketh up the entire large, gable-ceilinged bedroom.
"He must've eaten the cat's food again."
Ugh, sigh, sleep. Repeat several times.