And when you offer them to a rival, you can say:
"Sweets to the sweet, and nuts to you!"

Gotta look up etymology of "rival".

rival

SYLLABICATION: ri·val
PRONUNCIATION: rvl
NOUN: 1. One who attempts to equal or surpass another, or who pursues the same object as another; a competitor. 2. One that equals or almost equals another in a particular respect. 3. Obsolete A companion or an associate in a particular duty.
VERB: Inflected forms: ri·valed or ri·valled, ri·val·ing or ri·val·ling, ri·vals or ri·vals

TRANSITIVE VERB: 1. To attempt to equal or surpass. 2. To be the equal of; match: “They achieved more than they had ever dreamed, lending a magic to their family story that no tale or ordinary life could possibly rival” (Doris Kearns Goodwin).
INTRANSITIVE VERB: To be a competitor or rival; compete.
ETYMOLOGY: Latin rvlis, one using the same stream as another, a rival, from rvus, stream. See rei- in Appendix I.
SYNONYMS: rival, compete, vie These verbs mean to seek to equal or surpass another. Rival is the most general: “His ambition led him to rival the career of Edmund Burke” (Henry Adams). To compete is to contend with another or others to attain a goal, as a victory in a contest: Local hardware stores can't compete with discount outlets. Vie, often interchangeable with compete, sometimes stresses the challenge implicit in rivalry: The top three students vied for the title of valedictorian.