ADJ about n
The 'passionate' and 'cool' group
These adjectives indicate that someone likes someone or something very much or that they do not like them very much.
Keynes was notably cool about the idea.
Ann's friends were less enthusiastic about her plans.
She had a quiet sense of humour, was passionate about books and drama and had the wonderful gift of imparting that passion to her pupils.
He was handsome and women were wild about him it's said, but he had little interest in them.
The preposition about is sometimes followed by an '-ing' clause, especially in the case of enthusiastic, fanatical, keen, mad, and passionate.
At the end of a working day, Elizabeth is not keen about seeing people for dinner.
The preposition about is sometimes followed by a noun group and an '-ing' clause. This pattern is ADJ about n -ing.
batty bonkers cool crazy daft enthusiastic fanatical fervent keen mad passionate potty unenthusiastic wild
I'm not keen about people like my mother being controlled by drugs but I can understand how it is necessary.