Does the girl date provide the guy with his boutonniere?

The boy buys the girl a wrist corsage (the flowers are on a band that goes around the wrist) and this is most acceptable corsage rather than pinning a corsage on your dates dress. No, the girl does not buy a boutonniere for the boy and that's up to him. Once carnation, a single small rose, etc., is all that is required for the boy.