If Mary was a virgin, how did Jesus have brothers?

If Mary was a virgin, then how does Catholicism explain how Jesus had brothers? Are you sure that the Church didn't add that due to some neurosis over marital s*x, which there was a lot of neurosis among the church and they couldn't imagine Mary being anything other than a virgin.

Can someone explain why Jesus wasn't married when he was a Jew and he would've been expected to be married and it would have caused contention to his family and been a scandal in his community back then if he wasn't? Paul would have mentioned Jesus was celibate if he was. Why didn't he? The evidence suggests that Jesus was married and the Church censored the Bible, potentially destroying Gospels to hide this fact.