He enjoyed being laughed at by her.

Suppose Madeleine Lee did refuse to marry him! What of it?
"Pooh!" said Sybil; "you men are all just alike.

How can you be so silly?
Madeleine and you would be intolerable together.

Do find some one who won't be solemn!" They laid out their little plot against Madeleine and elaborated it carefully, both as to what Carrington should say and how he should say it, for Sybil asserted that men were too stupid to be trusted even in making a declaration of love, and must be taught, like little children to say their prayers.

Carrington enjoyed being taught how to make a declaration of love.
He did not ask where Sybil had learned so much about men's stupidity.