[boatbums]

Any Catholic worth their salt knows that venial sins do not have to be confessed

Tell me, is there a list somewhere that spells out what is considered venial vs. mortal sin?

[AnAmericanMother]

Generally, for a sin to be mortal requires three things:

1. Serious Matter

2. Sufficient Reflection

3. Full Consent of the Will

More detail here. Just search for "examination of conscience" and mortal and venial, and you'll find numerous discussions.

[A.A. Cunningham]

IV. The Gravity of Sin: Mortal and Venial Sin