the fly decides to makea home for itself in your left lung, after a while it gets lonely and starts pumping out pheromones at night which you exhale without realising, lots of horny male flies make their way to your sleeping half open mouth and mission it to your left lung which is know well known amongst the insect population as ‘the wet room’ for reasons i dont want to go into on a public forum.
due to differences in cultural attitudes the fly is not known as a whore and gains a reputation for being the best and the comfortable surroundings, warm moist lung tissue mean your left lung is eventually filled up with a thousand horny maggots. you dont notice all this happen until one day you inhale a bite-size shredded wheat into your right lung, this causes you to start to choke and panic… and begin to forcefully exhale horny maggots over a loved one.
EDIT – you were wrong yeti, but i applaud your effort.