There are many reasons.
1. He might want to know her first name in case he does not know her name.
2. He is in the mood to do something special with her.
3. He might be angry and does not want to call her first name.
You cannot detect love in names. Love can be detected in actions.
anne was the first name of miss sullivan
Evelyn is the first name of Miss Shaffer.
Miss Jane Marple
Miss Baker's first name is Jordan.
Miss Marple's first name is Jane.
Miss Earnshaw's first name in Wuthering Heights is Catherine.
Her first name is Maudie Her last name is atkinson
Miss Marple's first name is Jane.
They use your entire name
Maud
Heather