What does it mean when my boyfriend says I am his daughter after drinking?

The following is the explanation for my boyfriend saying that I am his daughter after drinking:

1. Joke or joke: People’s words and deeds after drinking are a little outrageous or funny. This sentence Just a joke or a way of joking, no special meaning.

2. Express close feelings: Some people will express more emotions when they are drunk. They think you are very close and dear, so they use intimate terms like "daughter" to express this feeling. .

3. Homophonic or slip of the tongue: After drinking, you will say the wrong thing or have a homophonic effect. This sentence is just a temporary misunderstanding or slip of the tongue.

4. Express care: People will be more straightforward after drinking. This sentence is his way of expressing his care and concern for you after drinking.