What happens when two pieces of bread from the same loaf have sex?
They become in-bread.
In-Bread
Explanation
Explain Bear
Listen up, buttercup. This joke is all about the word "inbred," which means that two people from the same family get it on. The joke uses "in-bread" as a play on words because the two slices are from the same loaf of bread. I know that was tough for you. I heard you failed a lot of reading comprehension tests in school. Sad!