Okay, so imagine you go to a birthday party and there's a big cake. Everyone is excited to eat a slice of the cake, right? Now, let's pretend the cake is very special because it was baked by the birthday boy's mom who loves him so much. And to show how much she loves him, she tells everyone that only people who truly love the birthday boy can have a slice of the cake.
In a way, that's kind of what dominicae cenae is about. You see, dominicae cenae is a fancy Latin phrase that means "On the Mystery and Worship of the Eucharist." That's a mouthful, huh? But basically, it's a document written by the Pope that explains why the Eucharist - which is the part of a Catholic Mass where the priest says a prayer and bread and wine become Jesus' body and blood - is very important.
It's like the cake at the birthday party. The Eucharist is very special to Catholics because we believe that Jesus is present in the bread and wine. But just like the birthday mom only lets people who truly love her son have a slice of the cake, at Mass, only Catholics who really believe in Jesus' presence in the Eucharist are allowed to receive it.
So, dominicae cenae is a letter from the Pope that reminds us how special the Eucharist is and why we should treat it with great respect. And just like we want to show love to the birthday boy by respecting the cake baked by his mom, Catholics want to show love to Jesus by treating the Eucharist properly when we receive it.