When a daddy fruit fly and a mama fruit fly are in love and get married then they make babies.
No, I specifically wanted the SHHypsters expert and personal experience, on the subjectSo basically you're asking us to Google this for you?
Fruit flies come from fruit. Meat flies comes from meat. There was a bunch of science experiments about this a few years back.
Does that mean dragon flies come from dragons? 'Cause, that'd be pretty rad...