Why do Amazon parrots have that weirdly sweet breath?

Amazons are hormonal birds. The phermones they excrete are responsible in keeping their mates attracted. Birds do not have a sense of smell like humans. We smell the phermones they put out. You can almost tell your Amazon parrots breeding cycle by the way their breath smells. Mine tends to get a little sweet and musty when it is that "time" of year. Either way they are amazing creatures.