This is definitely not normal. In a healthy family and society, a father should protect his child, not give the child to others in any improper way. This behavior violates basic moral and ethical principles.
Perhaps these stories are about the times when you went on family outings together. Your daddy could be telling his friends about how you reacted to new experiences during those trips. Maybe it was a camping trip and you were so excited to see the stars for the first time. Or it could be about a visit to a museum where you showed a great interest in a particular exhibit.
If your daddy's friends are accessible, you could approach them politely and ask if they remember the stories your daddy told about you. But make sure to do it in an appropriate and respectful way. For example, you could say, 'I heard my dad told some stories about me to you. I'm really curious about them. Could you share a bit?'
Perhaps he shares stories of the times you've been kind and helpful. For example, when you helped an elderly neighbor carry groceries. Or he might talk about your hobbies, like how much you love painting and the beautiful pictures you create.
You could also write him a little note. Say something like 'Dad, I'm curious about what you share with your friends regarding me.' This gives him time to think and write back to you. And it can be a really sweet way to start the conversation. If he doesn't respond in writing, you can then bring it up in person later.
Well, I don't actually know the specific story of your brother and his friends. Maybe they went on an adventure together, like exploring an old abandoned house in the neighborhood. They could have been scared at first but then found some cool stuff inside, like old comics or a hidden diary.
No, this is not normal in any culture. In a healthy relationship, it should be exclusive between two people. Sharing a partner in this way goes against the basic concept of a monogamous relationship and respect for an individual's autonomy.
This is a very serious situation. First, you should try to get away from him immediately and find a safe place. Then, you must tell your parents or a trusted adult about what has happened. They will be able to protect you and take the necessary steps to deal with this person.