You could gently let him know that you've heard those stories before. Maybe say something like 'Honey, I love hearing about your experiences, but I've already heard this one a few times.' He might not even realize he's repeating himself.
No, it's not normal. In a healthy relationship, both partners should respect each other. Telling rude stories shows a lack of respect for your feelings and the relationship environment.
One great example could be a fanfiction where the couple goes on a surprise picnic. The boyfriend arranges it in a beautiful meadow filled with wildflowers. He has prepared all of her favorite foods and reads her a poem he wrote about his love for her during the picnic. It's these small, sweet gestures that make the 'he loves me' moment even more special in the fanfiction.
Another approach could be to have a deeper conversation about values. Explain to him that the kind of stories he tells don't align with your values or the kind of relationship you want to have. Share with him your own values and how important it is for both of you to uphold certain standards in your communication. You can also suggest activities or topics that are more positive and respectful to focus on together, like discussing books, movies or hobbies.
One sad boyfriend story is that he planned a big surprise for his girlfriend's birthday. He saved up for months to buy her a beautiful necklace and arranged a romantic dinner at her favorite place. But on that day, she broke up with him over the phone, saying she had found someone else. He was left there alone with the dinner and the un - given gift.
One scary boyfriend story is that he always checked my phone secretly. He would go through all my messages and call logs when I was asleep or not around. It made me feel like I had no privacy at all.
You could also be honest and tell them that you've heard the story before. Maybe say something like 'I really enjoy your stories, but I think you've told this one already. Do you have a new one?' It might seem a bit direct, but it can be effective if done kindly.