If you’re serious about expanding your horizons and learning what you’ve never been taught, read this: https://www.amazon.com/Moth-Iron-Lung-Biography-Polio/dp/1717583679
Otherwise, feel free to remain an “ignorant moron”
You cut them flush. And check with your finger - if it feels rough then it's not good.
And it helps to have a pair of nice flush cutters.