When you go to confession, the priest gives you a penance to do to make up for your sin. Today, we can't always trust that novus ordo (post Vatican II) priests will do the right thing. The Mass has been changed unlawfully and etc... etc.. But the priest is supposed to give you a penance commensurate with your sin. So if you shop -lifted a package of beef, he'd tell you to take it back to the store if you haven't already eaten it.. LOL Maybe that's not the best example but you get the point, right? If you told someone you love to Go to Hell, he'd tell you to apologize and maybe talk things out... If you ate to the point of being uncomfortable (gluttony) he'd maybe tell you to fast for 20 hours, although NO priests rarely give anyone a "tough" penance like that